Frequencies for first 10,000 rows of pct012e026 variable in sf12000860us20 dataset :

   23 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,629       96.29       96.29
          1 |        296        2.96       99.25
          2 |         53        0.53       99.78
          3 |         15        0.15       99.93
          4 |          4        0.04       99.97
          6 |          1        0.01       99.98
          7 |          1        0.01       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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