Frequencies for first 10,000 rows of pct012k059 variable in sf12000860us26 dataset :

   56 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,189       91.89       91.89
          1 |        652        6.52       98.41
          2 |        100        1.00       99.41
          3 |         30        0.30       99.71
          4 |         11        0.11       99.82
          5 |          2        0.02       99.84
          6 |          1        0.01       99.85
          7 |          3        0.03       99.88
          8 |          2        0.02       99.90
         11 |          1        0.01       99.91
         16 |          1        0.01       99.92
         18 |          1        0.01       99.93
         20 |          1        0.01       99.94
         21 |          1        0.01       99.95
         24 |          1        0.01       99.96
         26 |          1        0.01       99.97
         30 |          1        0.01       99.98
         31 |          1        0.01       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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