Frequencies for first 10,000 rows of pct012o196 variable in sf12000860us30 dataset :

   89 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,548       95.48       95.48
          1 |        379        3.79       99.27
          2 |         55        0.55       99.82
          3 |         10        0.10       99.92
          4 |          7        0.07       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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