Frequencies for first 10,000 rows of pct012n140 variable in sf12010860us33 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,002       90.02       90.02
          1 |        615        6.15       96.17
          2 |        185        1.85       98.02
          3 |         74        0.74       98.76
          4 |         41        0.41       99.17
          5 |         23        0.23       99.40
          6 |         13        0.13       99.53
          7 |          9        0.09       99.62
          8 |          8        0.08       99.70
          9 |          4        0.04       99.74
         10 |          4        0.04       99.78
         11 |          3        0.03       99.81
         12 |          4        0.04       99.85
         13 |          1        0.01       99.86
         14 |          2        0.02       99.88
         15 |          1        0.01       99.89
         16 |          2        0.02       99.91
         17 |          3        0.03       99.94
         18 |          1        0.01       99.95
         23 |          1        0.01       99.96
         31 |          1        0.01       99.97
         37 |          1        0.01       99.98
         48 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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