The Bureau of Labor Statistics gives the median weekly salary for
someone with a Bachelor's degree as $737 (1998 data)
$737 per week comes to $38,324 for a 52 week work year.
http://www.bls.gov/news.release/wkyeng.t04.htm
Teachers salaries, $37,846 per anum (1995-1996 data), are here
http://nces.ed.gov/pubs/d96/D96T076.html