Frequencies for first 10,000 rows of pct012c126 variable in sf12000860us18 dataset :

   19 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,636       86.36       86.36
          1 |        872        8.72       95.08
          2 |        261        2.61       97.69
          3 |         92        0.92       98.61
          4 |         43        0.43       99.04
          5 |         26        0.26       99.30
          6 |         23        0.23       99.53
          7 |         11        0.11       99.64
          8 |          5        0.05       99.69
          9 |          9        0.09       99.78
         10 |          1        0.01       99.79
         11 |          6        0.06       99.85
         13 |          2        0.02       99.87
         16 |          1        0.01       99.88
         18 |          1        0.01       99.89
         20 |          1        0.01       99.90
         24 |          1        0.01       99.91
         25 |          1        0.01       99.92
         26 |          1        0.01       99.93
         30 |          1        0.01       99.94
         33 |          1        0.01       99.95
         55 |          2        0.02       99.97
         67 |          1        0.01       99.98
         68 |          1        0.01       99.99
        108 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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