Frequencies for first 10,000 rows of pct012c090 variable in sf12010860us22 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,890       98.90       98.90
          1 |        101        1.01       99.91
          2 |          6        0.06       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