Frequencies for first 10,000 rows of pct012n188 variable in sf12000860us29 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,883       98.83       98.83
          1 |         97        0.97       99.80
          2 |         10        0.10       99.90
          3 |          6        0.06       99.96
          4 |          1        0.01       99.97
          7 |          2        0.02       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017