Frequencies for first 10,000 rows of pct012g070 variable in sf12000860us22 dataset :

   67 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,509       85.09       85.09
          1 |        910        9.10       94.19
          2 |        292        2.92       97.11
          3 |         99        0.99       98.10
          4 |         55        0.55       98.65
          5 |         41        0.41       99.06
          6 |         27        0.27       99.33
          7 |         16        0.16       99.49
          8 |         14        0.14       99.63
          9 |          5        0.05       99.68
         10 |          5        0.05       99.73
         11 |          9        0.09       99.82
         12 |          8        0.08       99.90
         13 |          3        0.03       99.93
         14 |          2        0.02       99.95
         15 |          2        0.02       99.97
         16 |          2        0.02       99.99
         18 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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