Frequencies for first 10,000 rows of pct012o138 variable in sf12010860us34 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,885       68.85       68.85
          1 |      1,196       11.96       80.81
          2 |        619        6.19       87.00
          3 |        365        3.65       90.65
          4 |        235        2.35       93.00
          5 |        175        1.75       94.75
          6 |        139        1.39       96.14
          7 |         99        0.99       97.13
          8 |         55        0.55       97.68
          9 |         45        0.45       98.13
         10 |         49        0.49       98.62
         11 |         27        0.27       98.89
         12 |         32        0.32       99.21
         13 |         13        0.13       99.34
         14 |         19        0.19       99.53
         15 |          7        0.07       99.60
         16 |          9        0.09       99.69
         17 |          6        0.06       99.75
         18 |          6        0.06       99.81
         19 |          2        0.02       99.83
         20 |          4        0.04       99.87
         21 |          5        0.05       99.92
         22 |          2        0.02       99.94
         23 |          1        0.01       99.95
         25 |          1        0.01       99.96
         33 |          1        0.01       99.97
         34 |          1        0.01       99.98
         35 |          1        0.01       99.99
         37 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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