Frequencies for first 10,000 rows of pct012o198 variable in sf12000860us30 dataset :

   91 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,691       96.91       96.91
          1 |        262        2.62       99.53
          2 |         37        0.37       99.90
          3 |          7        0.07       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