Frequencies for first 10,000 rows of pct012k175 variable in sf12010860us30 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,358       93.58       93.58
          1 |        520        5.20       98.78
          2 |         79        0.79       99.57
          3 |         21        0.21       99.78
          4 |          4        0.04       99.82
          5 |          4        0.04       99.86
          6 |          3        0.03       99.89
          8 |          2        0.02       99.91
         11 |          1        0.01       99.92
         14 |          1        0.01       99.93
         15 |          1        0.01       99.94
         17 |          1        0.01       99.95
         21 |          1        0.01       99.96
         25 |          1        0.01       99.97
         31 |          1        0.01       99.98
         34 |          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