Frequencies for first 10,000 rows of pct012o040 variable in sf12010860us34 dataset :

   37 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,033       70.33       70.33
          1 |      1,367       13.67       84.00
          2 |        631        6.31       90.31
          3 |        331        3.31       93.62
          4 |        202        2.02       95.64
          5 |        165        1.65       97.29
          6 |         78        0.78       98.07
          7 |         61        0.61       98.68
          8 |         40        0.40       99.08
          9 |         20        0.20       99.28
         10 |         13        0.13       99.41
         11 |         20        0.20       99.61
         12 |         11        0.11       99.72
         13 |         11        0.11       99.83
         14 |          5        0.05       99.88
         15 |          1        0.01       99.89
         16 |          4        0.04       99.93
         17 |          2        0.02       99.95
         20 |          1        0.01       99.96
         22 |          1        0.01       99.97
         28 |          1        0.01       99.98
         31 |          1        0.01       99.99
         34 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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