Frequencies for first 10,000 rows of pct012c149 variable in sf12000860us18 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,438       84.38       84.38
          1 |      1,080       10.80       95.18
          2 |        285        2.85       98.03
          3 |         92        0.92       98.95
          4 |         37        0.37       99.32
          5 |         22        0.22       99.54
          6 |         10        0.10       99.64
          7 |          8        0.08       99.72
          8 |          9        0.09       99.81
          9 |          5        0.05       99.86
         10 |          2        0.02       99.88
         12 |          1        0.01       99.89
         16 |          1        0.01       99.90
         24 |          1        0.01       99.91
         26 |          1        0.01       99.92
         27 |          2        0.02       99.94
         35 |          1        0.01       99.95
         47 |          1        0.01       99.96
         49 |          1        0.01       99.97
         60 |          1        0.01       99.98
         61 |          1        0.01       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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