Frequencies for first 10,000 rows of pct012c194 variable in sf12000860us18 dataset :

   87 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,888       98.88       98.88
          1 |         97        0.97       99.85
          2 |         10        0.10       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