Frequencies for first 10,000 rows of pct012c084 variable in sf12010860us22 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,755       97.55       97.55
          1 |        218        2.18       99.73
          2 |         17        0.17       99.90
          3 |          6        0.06       99.96
          4 |          1        0.01       99.97
          5 |          1        0.01       99.98
          9 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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