Frequencies for first 10,000 rows of pct012c138 variable in sf12010860us22 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,518       85.18       85.18
          1 |        909        9.09       94.27
          2 |        277        2.77       97.04
          3 |        135        1.35       98.39
          4 |         59        0.59       98.98
          5 |         41        0.41       99.39
          6 |         16        0.16       99.55
          7 |          4        0.04       99.59
          8 |          6        0.06       99.65
          9 |         11        0.11       99.76
         10 |          6        0.06       99.82
         11 |          2        0.02       99.84
         12 |          1        0.01       99.85
         13 |          3        0.03       99.88
         16 |          2        0.02       99.90
         17 |          2        0.02       99.92
         24 |          1        0.01       99.93
         31 |          1        0.01       99.94
         33 |          1        0.01       99.95
         34 |          1        0.01       99.96
         43 |          1        0.01       99.97
         55 |          1        0.01       99.98
         65 |          1        0.01       99.99
         81 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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