Frequencies for first 10,000 rows of pct012k179 variable in sf12010860us30 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,491       94.91       94.91
          1 |        415        4.15       99.06
          2 |         56        0.56       99.62
          3 |         16        0.16       99.78
          4 |          6        0.06       99.84
          5 |          3        0.03       99.87
          6 |          3        0.03       99.90
          8 |          2        0.02       99.92
         10 |          1        0.01       99.93
         13 |          1        0.01       99.94
         15 |          2        0.02       99.96
         17 |          1        0.01       99.97
         18 |          1        0.01       99.98
         20 |          1        0.01       99.99
         51 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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