Frequencies for first 10,000 rows of pct012e024 variable in sf12000860us20 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,601       96.01       96.01
          1 |        310        3.10       99.11
          2 |         58        0.58       99.69
          3 |         15        0.15       99.84
          4 |          9        0.09       99.93
          5 |          5        0.05       99.98
          8 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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