Frequencies for first 10,000 rows of pct012e025 variable in sf12000860us20 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,608       96.08       96.08
          1 |        305        3.05       99.13
          2 |         60        0.60       99.73
          3 |         15        0.15       99.88
          4 |          7        0.07       99.95
          5 |          3        0.03       99.98
          6 |          1        0.01       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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