Frequencies for first 10,000 rows of pct013c023 variable in sf12000860us31 dataset :

   75 to 79 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,091       90.91       90.91
          1 |        669        6.69       97.60
          2 |        146        1.46       99.06
          3 |         46        0.46       99.52
          4 |         17        0.17       99.69
          5 |          7        0.07       99.76
          6 |          4        0.04       99.80
          7 |          2        0.02       99.82
          8 |          2        0.02       99.84
          9 |          1        0.01       99.85
         10 |          4        0.04       99.89
         12 |          1        0.01       99.90
         14 |          3        0.03       99.93
         16 |          1        0.01       99.94
         19 |          1        0.01       99.95
         24 |          1        0.01       99.96
         31 |          1        0.01       99.97
         32 |          1        0.01       99.98
         37 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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