Frequencies for first 10,000 rows of pct012g204 variable in sf12000860us22 dataset :

   97 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,892       98.92       98.92
          1 |        100        1.00       99.92
          2 |          5        0.05       99.97
          3 |          2        0.02       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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