Frequencies for first 10,000 rows of prov1535 variable in pos2003 dataset :

  organized |
     family |
      group |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,072       90.72       90.72
          Y |        928        9.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016