1880 U.S. Census: Preliminary 5% sample
1910 Puerto Rico census: 12% sample
1920 Puerto Rico census: 12% sample
1970 Puerto Rico census: 1% State, 1% Municipio, and 1% Neighborhood samples
1980 Puerto Rico census: 5% State sample and 1% Metro sample
1990 Puerto Rico census: 5% State sample and 1% Metro sample
2000 Puerto Rico census: 5% sample and 1% sample
2005 Puerto Rico Community Survey: 1% sample
2006 Puerto Rico Community Survey: 1% sample
Revised 1850-1930 samples, including
numerous improvements