Frequencies for first 10,000 rows of pct012f199 variable in sf12000860us21 dataset :

   92 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,790       97.90       97.90
          1 |        139        1.39       99.29
          2 |         42        0.42       99.71
          3 |         16        0.16       99.87
          4 |          9        0.09       99.96
          5 |          1        0.01       99.97
          6 |          1        0.01       99.98
          7 |          1        0.01       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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