Money data sources for later:
http://www.census.gov/prod/www/abs/popula.html
http://www.census.gov/prod/2002pubs/p60-218.pdf
http://www.sipp.census.gov/sipp/pubsmain.htm
http://taxes.yahoo.com/rates.html
http://www.irs.gov/publications/p590/ch01.html#d0e1617