Frequencies for first 10,000 rows of pct012k036 variable in sf12000860us26 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,822       88.22       88.22
          1 |        853        8.53       96.75
          2 |        208        2.08       98.83
          3 |         61        0.61       99.44
          4 |         19        0.19       99.63
          5 |          9        0.09       99.72
          6 |          7        0.07       99.79
          7 |          3        0.03       99.82
          8 |          3        0.03       99.85
          9 |          1        0.01       99.86
         11 |          2        0.02       99.88
         12 |          1        0.01       99.89
         14 |          1        0.01       99.90
         15 |          1        0.01       99.91
         18 |          1        0.01       99.92
         21 |          1        0.01       99.93
         23 |          1        0.01       99.94
         27 |          1        0.01       99.95
         33 |          1        0.01       99.96
         49 |          1        0.01       99.97
         50 |          1        0.01       99.98
         54 |          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