Frequencies for first 10,000 rows of pct012c054 variable in sf12000860us18 dataset :

   51 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,746       87.46       87.46
          1 |        938        9.38       96.84
          2 |        201        2.01       98.85
          3 |         67        0.67       99.52
          4 |         20        0.20       99.72
          5 |          6        0.06       99.78
          6 |          4        0.04       99.82
          7 |          1        0.01       99.83
          8 |          5        0.05       99.88
          9 |          2        0.02       99.90
         10 |          1        0.01       99.91
         16 |          1        0.01       99.92
         17 |          1        0.01       99.93
         22 |          1        0.01       99.94
         28 |          1        0.01       99.95
         31 |          1        0.01       99.96
         42 |          1        0.01       99.97
         50 |          1        0.01       99.98
         60 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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