Frequencies for first 10,000 rows of pct012l094 variable in sf12010860us31 dataset :

   91 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,645       96.45       96.45
          1 |        266        2.66       99.11
          2 |         56        0.56       99.67
          3 |         13        0.13       99.80
          4 |          7        0.07       99.87
          5 |          4        0.04       99.91
          6 |          4        0.04       99.95
          7 |          1        0.01       99.96
          8 |          1        0.01       99.97
          9 |          1        0.01       99.98
         16 |          1        0.01       99.99
         30 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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