Frequencies for first 10,000 rows of pct012e021 variable in sf12000860us20 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,644       96.44       96.44
          1 |        286        2.86       99.30
          2 |         55        0.55       99.85
          3 |          5        0.05       99.90
          4 |          6        0.06       99.96
          5 |          3        0.03       99.99
          7 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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