The relief was subtracted from the total annual school property tax bill. Property owners apply for the relief through the county Treasurer's office. Farmers can qualify for a farmstead exemption on building used for agricultural purposes. The farm must be at least and must be the primary residence of the owner. Farmers can qualify for both the homestead exemption and the farmstead exemption. In Allegheny County, 60% of eligible property owners applied for property tax relief in 2009. Additionally, the Pennsylvania Property Tax/Rent Rebate program is provided for low income Pennsylvanians aged 65 and older; widows and widowers aged 50 and older; and people with disabilities age 18 and older. The income limit is $35,000 for homeowners. The maximum rebate for both homeowners and renters is $650. Applicants can exclude one-half (1/2) of their Social Security income, so people who make substantially more than $35,000 may still qualify for a rebate. Individuals must apply annually for the rebate. This can be taken in addition to Homestead/Farmstead Property Tax Relief. Property taxes in Pennsylvania are relatively high on a national scale. According to the Tax Foundation, Pennsylvania ranked 11th in the U.S. in 2008 in terms of property taxes paid as a percentage of home value (1.34%) and 12th in the country in terms of property taxes as a percentage of income (3.55%). A proposal has been made by David Wassell, a prominent resident and leader in Allegheny County, to consolidate Allegheny County school districts to save tax dollars and improve student services. The proposal is that Allegheny Valley School District join with Deer Lakes School District. Governor Edward Rendell proposed that consolidation with adjacent school districts, in each county, would achieve substantial cost savings. The savings could be redirected to improving lagging reading and science achievement, to enriching the academic programs or to reducing residents' property taxes. Pennsylvania has one of the highest numbers of school districts in the nation. In Pennsylvania, 80% of the school districts serve student populations under 5,000, and 40% serve less than 2,000. Less than 95 of Pennsylvania's 501 school districts have enrollment below 1250 students, in 2007. This results in excessive school administration bureaucracy and not enough course diversity. In a survey of 88 superintendents of small districts, 42% of the respondents stated that they believed consolidation would save money without closing any schools. The district offers a variety of clubs, activities and sports. Eligibility for participation is set by school board policy  and the Pennsylvania Interscholastic Athletic Association.