What is the company's targeted growth in the dividend over the next 7-8 years 
 where that activity ends up and how we can -- what we get back from our customers and that does fluctuate up and down over time.
Richard Hamilton Prentiss -- Raymond James & Associates -- Analyst
Thanks, Jay. One more quick one, and then you'll get someone else squeezed in. Any updated thoughts on in Building Systems. There has been a lot of talk about private 5G networks and what the opportunity might be. What are your thoughts as far as capital deployment back to kind of question on what's the opportunity for private 5G maybe in Building Systems?
Jay A. Brown -- President and Chief Executive Officer
Yeah. The in-building and I would put venues into this category to five or six years ago, we had talked about in building and venues and we saw some opportunities but relatively limited. And that business has really picked up on the small cell side. And we are seeing some really nice opportunities on in building and venues and seeing some healthy growth there. The returns are good.
It's a place where we like to invest. Certainly, it falls into that category of the densification comments that I was making earlier. Any place to see a densification of people with the growth in traffic that we're seeing, really the only way to manage the network toward a viable solution is to go in and put in small cells and that's true in the public right of ways, and it's true in venues and in buildings.
So the growth in traffic that we're talking about and the deployment of this 5G network just requires a greater densification than in building and then use are following the same pattern that we're seeing happen in right of ways.
Richard Hamilton Prentiss -- Raymond James & Associates -- Analyst
Great, thanks guys, stay well.
Benjamin Raymond Lowe -- Vice President of Corporate Finance
Maybe we can try to squeeze in two more callers before we drop off this morning.
Operator
Next, we'll hear from Sam Badri of Credit Suisse.
Sami Badri -- Credit Suisse -- Analyst
Hi, thank you. I wanted to ask you about your tenants with power that moved higher in the quarter and it comes along with the solid move in your rental revenue per tower. Is there any opportunity for accelerated tenancy improvement given the 5G build in some of the other trends that you mentioned? And as you see tenant to go up, what the impacts of free cash flow at this point?
Jay A. Brown -- President and Chief Executive Officer
Yeah, we are seeing increased tenancy on the towers. Historically, we've added about one tenant every 10 years roughly. I think that's a pretty good forecast for what we'll see over the long term. It's underpinning our 7% to 8% targeted growth in the dividend over time. So I think we'll -- I think that's kind of the path that we're on. And as I made the comments earlier around the capital spending by the carriers in the environment that we're in, I think we've got a good tailwind to continue to stay on that path of increasing tenancy of about one tenant over 10 years.
The unit economics of the business remain intact and Dan mentioned this in his prepared remarks. But we're drop in $0.90 of every dollar up at the Organic Site Rental revenue lines. We're dropping that all the way down to AFFO. And this is a real credit to our team who has done a tremendous job of managing the expenses and being thoughtful about places where we can take out costs in order to achieve that those very high incremental margins on incremental dollars of revenue.
And that's one of the beauties of our business model and certainly one we think we can continue to sustain and improve upon.
Sami Badri -- Credit Suisse -- Analyst
Got it. One other follow-up is, does your guidance include any type of benefit from the Biden infrastructure bill that may be passed in the near future? And then, if your guidance does not include it, how do you imagine the broadband budgeted spend benefit your business if it -- there is a path for that?
Jay A. Brown -- President and Chief Executive Officer
We have not anticipated any of that in our current forecast or guidance. I think the most likely path for be
 where that activity ends up and how we can -- what we get back from our customers and that does fluctuate up and down over time.
Richard Hamilton Prentiss -- Raymond James & Associates -- Analyst
Thanks, Jay. One more quick one, and then you'll get someone else squeezed in. Any updated thoughts on in Building Systems. There has been a lot of talk about private 5G networks and what the opportunity might be. What are your thoughts as far as capital deployment back to kind of question on what's the opportunity for private 5G maybe in Building Systems?
Jay A. Brown -- President and Chief Executive Officer
Yeah. The in-building and I would put venues into this category to five or six years ago, we had talked about in building and venues and we saw some opportunities but relatively limited. And that business has really picked up on the small cell side. And we are seeing some really nice opportunities on in building and venues and seeing some healthy growth there. The returns are good.
It's a place where we like to invest. Certainly, it falls into that category of the densification comments that I was making earlier. Any place to see a densification of people with the growth in traffic that we're seeing, really the only way to manage the network toward a viable solution is to go in and put in small cells and that's true in the public right of ways, and it's true in venues and in buildings.
So the growth in traffic that we're talking about and the deployment of this 5G network just requires a greater densification than in building and then use are following the same pattern that we're seeing happen in right of ways.
Richard Hamilton Prentiss -- Raymond James & Associates -- Analyst
Great, thanks guys, stay well.
Benjamin Raymond Lowe -- Vice President of Corporate Finance
Maybe we can try to squeeze in two more callers before we drop off this morning.
Operator
Next, we'll hear from Sam Badri of Credit Suisse.
Sami Badri -- Credit Suisse -- Analyst
Hi, thank you. I wanted to ask you about your tenants with power that moved higher in the quarter and it comes along with the solid move in your rental revenue per tower. Is there any opportunity for accelerated tenancy improvement given the 5G build in some of the other trends that you mentioned? And as you see tenant to go up, what the impacts of free cash flow at this point?
Jay A. Brown -- President and Chief Executive Officer
 Yeah, we are seeing increased tenancy on the towers. Historically, we've added about one tenant every 10 years roughly. I think that's a pretty good forecast for what we'll see over the long term. It's underpinning our 7% to 8% targeted growth in the dividend over time. So I think we'll -- I think that's kind of the path that we're on. And as I made the comments earlier around the capital spending by the carriers in the environment that we're in, I think we've got a good tailwind to continue to stay on that path of increasing tenancy of about one tenant over 10 years.
The unit economics of the business remain intact and Dan mentioned this in his prepared remarks. But we're drop in $0.90 of every dollar up at the Organic Site Rental revenue lines. We're dropping that all the way down to AFFO. And this is a real credit to our team who has done a tremendous job of managing the expenses and being thoughtful about places where we can take out costs in order to achieve that those very high incremental margins on incremental dollars of revenue.
And that's one of the beauties of our business model and certainly one we think we can continue to sustain and improve upon.
Sami Badri -- Credit Suisse -- Analyst
Got it. One other follow-up is, does your guidance include any type of benefit from the Biden infrastructure bill that may be passed in the near future? And then, if your guidance does not include it, how do you imagine the broadband budgeted spend benefit your business if it -- there is a path for that?
Jay A. Brown -- President and Chief Executive Officer
We have not anticipated any of that in our current forecast or guidance. I think the most likely path for be