Frequencies for first 10,000 rows of pct012o181 variable in sf12010860us34 dataset :

   74 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,729       87.29       87.29
          1 |        935        9.35       96.64
          2 |        219        2.19       98.83
          3 |         82        0.82       99.65
          4 |         25        0.25       99.90
          5 |          2        0.02       99.92
          6 |          3        0.03       99.95
          7 |          1        0.01       99.96
          8 |          1        0.01       99.97
          9 |          1        0.01       99.98
         11 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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