Frequencies for first 10,000 rows of pct012n170 variable in sf12010860us33 dataset :

   63 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,574       95.74       95.74
          1 |        323        3.23       98.97
          2 |         60        0.60       99.57
          3 |         14        0.14       99.71
          4 |          9        0.09       99.80
          5 |          6        0.06       99.86
          6 |          2        0.02       99.88
          7 |          1        0.01       99.89
          8 |          2        0.02       99.91
          9 |          1        0.01       99.92
         10 |          2        0.02       99.94
         12 |          1        0.01       99.95
         13 |          1        0.01       99.96
         16 |          2        0.02       99.98
         17 |          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