Source: US Census. The median household income in the US is $50,502. This is some extremely useful data given that it is exploring over 114 million US households. If you want to know how most Americans are living this is a good figure to base your assumptions.
The myth that you have to wait 30 minutes or even an hour until you can swim after eating has been conventional wisdom for some time. The simple fact is, however, that swimming on a full stomach does not significantly impact your ability to swim.
How long should I wait to go swimming after adding any of my swimming pool chemicals. I've heard different stories from different people. I've heard you can swim immediately, but some people say to wait 15 - 30 minutes, and some say even longer, like 10 - 12 hours.