Frequencies for first 10,000 rows of pct012k092 variable in sf12000860us26 dataset :

   89 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,960       99.60       99.60
          1 |         34        0.34       99.94
          2 |          5        0.05       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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