Frequencies for first 10,000 rows of prov1240 variable in pos2005 dataset :

   subunits |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,978       99.78       99.78
          1 |         13        0.13       99.91
          2 |          5        0.05       99.96
          3 |          1        0.01       99.97
          4 |          2        0.02       99.99
         74 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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