Frequencies for first 10,000 rows of pct012n040 variable in sf12010860us33 dataset :

   37 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,138       91.38       91.38
          1 |        537        5.37       96.75
          2 |        163        1.63       98.38
          3 |         53        0.53       98.91
          4 |         35        0.35       99.26
          5 |         15        0.15       99.41
          6 |         10        0.10       99.51
          7 |         11        0.11       99.62
          8 |          8        0.08       99.70
          9 |          4        0.04       99.74
         10 |          3        0.03       99.77
         11 |          6        0.06       99.83
         12 |          1        0.01       99.84
         13 |          3        0.03       99.87
         15 |          2        0.02       99.89
         16 |          1        0.01       99.90
         17 |          1        0.01       99.91
         18 |          1        0.01       99.92
         20 |          2        0.02       99.94
         21 |          1        0.01       99.95
         29 |          1        0.01       99.96
         30 |          1        0.01       99.97
         31 |          1        0.01       99.98
         34 |          1        0.01       99.99
         43 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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