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.
A reader writes: I am always at a loss for what to feed my swimmers before a big meet. Their next one is two days away - I stress out for my children! They look to me for what to eat (not how to swim). I understand there should be no major changes in their diet for that day. Fruits and vegetables can be difficult to digest.