Frequencies for first 10,000 rows of prov1535 variable in pos1996 dataset :

  organized |
     family |
      group |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,878       88.78       88.78
          Y |      1,122       11.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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