Frequencies for first 10,000 rows of pct013c023 variable in sf12010860us35 dataset :

   75 to 79 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,672       86.72       86.72
          1 |        949        9.49       96.21
          2 |        208        2.08       98.29
          3 |         86        0.86       99.15
          4 |         37        0.37       99.52
          5 |         16        0.16       99.68
          6 |          9        0.09       99.77
          7 |          5        0.05       99.82
          8 |          1        0.01       99.83
          9 |          1        0.01       99.84
         10 |          3        0.03       99.87
         12 |          1        0.01       99.88
         13 |          1        0.01       99.89
         15 |          1        0.01       99.90
         20 |          2        0.02       99.92
         22 |          1        0.01       99.93
         31 |          1        0.01       99.94
         34 |          2        0.02       99.96
         41 |          1        0.01       99.97
         42 |          1        0.01       99.98
         52 |          1        0.01       99.99
         89 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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