Frequencies for first 10,000 rows of pct012k193 variable in sf12000860us26 dataset :

   86 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,860       98.60       98.60
          1 |        122        1.22       99.82
          2 |         10        0.10       99.92
          3 |          1        0.01       99.93
          4 |          2        0.02       99.95
          5 |          2        0.02       99.97
          7 |          1        0.01       99.98
         10 |          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