Frequencies for first 10,000 rows of pct012c142 variable in sf12000860us18 dataset :

   35 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,404       84.04       84.04
          1 |      1,073       10.73       94.77
          2 |        293        2.93       97.70
          3 |         95        0.95       98.65
          4 |         51        0.51       99.16
          5 |         30        0.30       99.46
          6 |         16        0.16       99.62
          7 |          6        0.06       99.68
          8 |          8        0.08       99.76
          9 |          5        0.05       99.81
         10 |          2        0.02       99.83
         11 |          5        0.05       99.88
         14 |          1        0.01       99.89
         15 |          2        0.02       99.91
         19 |          1        0.01       99.92
         22 |          1        0.01       99.93
         23 |          1        0.01       99.94
         30 |          1        0.01       99.95
         39 |          1        0.01       99.96
         55 |          1        0.01       99.97
         70 |          1        0.01       99.98
         72 |          1        0.01       99.99
         84 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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