Frequencies for first 10,000 rows of pct012k140 variable in sf12000860us26 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,835       88.35       88.35
          1 |        826        8.26       96.61
          2 |        204        2.04       98.65
          3 |         71        0.71       99.36
          4 |         31        0.31       99.67
          5 |          5        0.05       99.72
          6 |          7        0.07       99.79
          7 |          4        0.04       99.83
          8 |          1        0.01       99.84
          9 |          2        0.02       99.86
         11 |          2        0.02       99.88
         12 |          1        0.01       99.89
         14 |          1        0.01       99.90
         19 |          1        0.01       99.91
         20 |          1        0.01       99.92
         21 |          1        0.01       99.93
         23 |          1        0.01       99.94
         27 |          1        0.01       99.95
         36 |          1        0.01       99.96
         44 |          1        0.01       99.97
         62 |          1        0.01       99.98
         65 |          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