Frequencies for first 10,000 rows of pct012f200 variable in sf12000860us21 dataset :

   93 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,837       98.37       98.37
          1 |        116        1.16       99.53
          2 |         26        0.26       99.79
          3 |         12        0.12       99.91
          4 |          5        0.05       99.96
          5 |          3        0.03       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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