Frequencies for first 10,000 rows of pct012n186 variable in sf12010880us33 dataset :

   79 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,830       98.30       98.30
          1 |        134        1.34       99.64
          2 |         24        0.24       99.88
          3 |          4        0.04       99.92
          4 |          3        0.03       99.95
          5 |          1        0.01       99.96
          8 |          1        0.01       99.97
         10 |          1        0.01       99.98
         12 |          1        0.01       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 May 2017