Frequencies for first 10,000 rows of pct012k022 variable in sf12000860us26 dataset :

   19 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,816       88.16       88.16
          1 |        853        8.53       96.69
          2 |        169        1.69       98.38
          3 |         67        0.67       99.05
          4 |         35        0.35       99.40
          5 |         20        0.20       99.60
          6 |          8        0.08       99.68
          7 |          5        0.05       99.73
          8 |          4        0.04       99.77
          9 |          2        0.02       99.79
         10 |          2        0.02       99.81
         11 |          1        0.01       99.82
         12 |          2        0.02       99.84
         13 |          2        0.02       99.86
         14 |          1        0.01       99.87
         16 |          2        0.02       99.89
         19 |          1        0.01       99.90
         23 |          3        0.03       99.93
         32 |          1        0.01       99.94
         33 |          1        0.01       99.95
         44 |          1        0.01       99.96
         45 |          1        0.01       99.97
         47 |          1        0.01       99.98
         68 |          1        0.01       99.99
         92 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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