The Census Bureau releases the American Housing Survey every two years. This particular survey is important in that it encompasses the drop in real estate prices....
Here are some interesting facts....
There are 76.428 million owner occupied units...50.300 million have a mortgage...24.206 million own their home free and clear.....10.962 million have a mortgage of under $50,000....
so 46% of home owners own their home outright or have a mortgage of less than $50,000...
24.066 million had a mortgage of 6% or more in 2009( I am sure this is much less with all
the refinancings in 2010)....5.804 million have a mortgage and are over 65 ( the median mortgage for this group is $55,911 and the loan to value is 35%)
Here is the link....
http://www.census.gov/hhes/www/housing/ahs/ahs09/ahs09.html