Frequencies for first 10,000 rows of pct012n071 variable in sf12010860us33 dataset :

   68 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,723       97.23       97.23
          1 |        226        2.26       99.49
          2 |         26        0.26       99.75
          3 |         15        0.15       99.90
          4 |          2        0.02       99.92
          5 |          3        0.03       99.95
          6 |          2        0.02       99.97
          7 |          1        0.01       99.98
          9 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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