Frequencies for first 10,000 rows of pct012k081 variable in sf12010860us30 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,731       97.31       97.31
          1 |        234        2.34       99.65
          2 |         22        0.22       99.87
          3 |          3        0.03       99.90
          4 |          5        0.05       99.95
          5 |          1        0.01       99.96
          7 |          2        0.02       99.98
         13 |          1        0.01       99.99
         16 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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