Frequencies for first 10,000 rows of pct012e021 variable in sf12010860us24 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,689       96.89       96.89
          1 |        253        2.53       99.42
          2 |         40        0.40       99.82
          3 |          9        0.09       99.91
          4 |          2        0.02       99.93
          5 |          4        0.04       99.97
          6 |          1        0.01       99.98
          8 |          1        0.01       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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