Frequencies for first 10,000 rows of pct012k057 variable in sf12000860us26 dataset :

   54 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,084       90.84       90.84
          1 |        732        7.32       98.16
          2 |        129        1.29       99.45
          3 |         24        0.24       99.69
          4 |         10        0.10       99.79
          5 |          5        0.05       99.84
          6 |          3        0.03       99.87
          7 |          1        0.01       99.88
         10 |          1        0.01       99.89
         11 |          1        0.01       99.90
         15 |          2        0.02       99.92
         17 |          1        0.01       99.93
         18 |          1        0.01       99.94
         19 |          1        0.01       99.95
         24 |          1        0.01       99.96
         25 |          1        0.01       99.97
         40 |          1        0.01       99.98
         41 |          1        0.01       99.99
         55 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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