Frequencies for first 10,000 rows of pct012k194 variable in sf12000860us26 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,904       99.04       99.04
          1 |         83        0.83       99.87
          2 |          8        0.08       99.95
          3 |          2        0.02       99.97
          4 |          1        0.01       99.98
          6 |          1        0.01       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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