Frequencies for first 10,000 rows of pct012c062 variable in sf12000860us18 dataset :

   59 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,198       91.98       91.98
          1 |        647        6.47       98.45
          2 |         91        0.91       99.36
          3 |         32        0.32       99.68
          4 |         15        0.15       99.83
          5 |          5        0.05       99.88
          6 |          3        0.03       99.91
          9 |          1        0.01       99.92
         12 |          1        0.01       99.93
         13 |          3        0.03       99.96
         21 |          1        0.01       99.97
         31 |          2        0.02       99.99
         46 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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