Frequencies for first 10,000 rows of pct012o064 variable in sf12000860us30 dataset :

   61 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,387       83.87       83.87
          1 |      1,042       10.42       94.29
          2 |        312        3.12       97.41
          3 |        111        1.11       98.52
          4 |         57        0.57       99.09
          5 |         28        0.28       99.37
          6 |         15        0.15       99.52
          7 |         13        0.13       99.65
          8 |         13        0.13       99.78
          9 |          7        0.07       99.85
         10 |          7        0.07       99.92
         11 |          3        0.03       99.95
         12 |          1        0.01       99.96
         13 |          2        0.02       99.98
         14 |          1        0.01       99.99
         21 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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