Frequencies for first 10,000 rows of pct012k128 variable in sf12000860us26 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,908       89.08       89.08
          1 |        795        7.95       97.03
          2 |        166        1.66       98.69
          3 |         71        0.71       99.40
          4 |         20        0.20       99.60
          5 |          9        0.09       99.69
          6 |          8        0.08       99.77
          7 |          5        0.05       99.82
          8 |          2        0.02       99.84
          9 |          1        0.01       99.85
         10 |          1        0.01       99.86
         11 |          2        0.02       99.88
         16 |          1        0.01       99.89
         18 |          1        0.01       99.90
         19 |          1        0.01       99.91
         20 |          1        0.01       99.92
         22 |          1        0.01       99.93
         34 |          1        0.01       99.94
         35 |          1        0.01       99.95
         37 |          1        0.01       99.96
         52 |          1        0.01       99.97
         60 |          1        0.01       99.98
         68 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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