2001 Questionnaires at http://www.sipp.census.gov/sipp/core_content/2001/quests/folder.htm
2000 Questionnaires at http://www.sipp.census.gov/sipp/core_content/2000/quests/folder.htm

dc.nber.org%> sum sipp01w1.dat
05347 773217
dc.nber.org%> sum l01puw1.dat 
20772 773217