Frequencies for first 10,000 rows of pct012c145 variable in sf12000860us18 dataset :

   38 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,449       84.49       84.49
          1 |      1,053       10.53       95.02
          2 |        282        2.82       97.84
          3 |        100        1.00       98.84
          4 |         44        0.44       99.28
          5 |         22        0.22       99.50
          6 |         19        0.19       99.69
          7 |          9        0.09       99.78
          8 |          7        0.07       99.85
          9 |          1        0.01       99.86
         10 |          1        0.01       99.87
         11 |          2        0.02       99.89
         15 |          1        0.01       99.90
         20 |          1        0.01       99.91
         21 |          1        0.01       99.92
         24 |          1        0.01       99.93
         30 |          1        0.01       99.94
         36 |          2        0.02       99.96
         42 |          1        0.01       99.97
         63 |          1        0.01       99.98
         65 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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