Frequencies for first 10,000 rows of pct012e127 variable in sf12000860us20 dataset :

   20 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,662       96.62       96.62
          1 |        273        2.73       99.35
          2 |         42        0.42       99.77
          3 |         12        0.12       99.89
          4 |          6        0.06       99.95
          5 |          2        0.02       99.97
          6 |          2        0.02       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017