Frequencies for first 10,000 rows of pct012g177 variable in sf12010860us26 dataset :

   70 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,166       81.66       81.66
          1 |      1,120       11.20       92.86
          2 |        342        3.42       96.28
          3 |        152        1.52       97.80
          4 |         63        0.63       98.43
          5 |         34        0.34       98.77
          6 |         33        0.33       99.10
          7 |         21        0.21       99.31
          8 |         15        0.15       99.46
          9 |         17        0.17       99.63
         10 |         12        0.12       99.75
         11 |         10        0.10       99.85
         12 |          1        0.01       99.86
         13 |          3        0.03       99.89
         14 |          2        0.02       99.91
         15 |          1        0.01       99.92
         16 |          1        0.01       99.93
         17 |          1        0.01       99.94
         18 |          1        0.01       99.95
         19 |          2        0.02       99.97
         21 |          2        0.02       99.99
         26 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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