Frequencies for first 10,000 rows of pct012c066 variable in sf12010860us22 dataset :

   63 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,802       88.02       88.02
          1 |        916        9.16       97.18
          2 |        176        1.76       98.94
          3 |         57        0.57       99.51
          4 |         18        0.18       99.69
          5 |         11        0.11       99.80
          6 |          4        0.04       99.84
          7 |          3        0.03       99.87
          9 |          1        0.01       99.88
         11 |          2        0.02       99.90
         14 |          1        0.01       99.91
         15 |          1        0.01       99.92
         19 |          1        0.01       99.93
         20 |          1        0.01       99.94
         23 |          2        0.02       99.96
         32 |          1        0.01       99.97
         50 |          1        0.01       99.98
         56 |          1        0.01       99.99
         79 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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