Frequencies for first 10,000 rows of pct012l092 variable in sf12000860us27 dataset :

   89 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,730       97.30       97.30
          1 |        207        2.07       99.37
          2 |         37        0.37       99.74
          3 |         13        0.13       99.87
          4 |          6        0.06       99.93
          5 |          1        0.01       99.94
          7 |          2        0.02       99.96
          8 |          1        0.01       99.97
         12 |          1        0.01       99.98
         18 |          1        0.01       99.99
         19 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017