Frequencies for first 10,000 rows of pct012o197 variable in sf12010860us34 dataset :

   90 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,605       96.05       96.05
          1 |        348        3.48       99.53
          2 |         35        0.35       99.88
          3 |          9        0.09       99.97
          4 |          2        0.02       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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