Frequencies for first 10,000 rows of prov1240 variable in pos1992 dataset :

   subunits |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,978       99.78       99.78
          1 |         13        0.13       99.91
          2 |          2        0.02       99.93
          3 |          1        0.01       99.94
          4 |          1        0.01       99.95
          5 |          1        0.01       99.96
          6 |          1        0.01       99.97
          8 |          1        0.01       99.98
         63 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017