Frequencies for first 10,000 rows of pct012c021 variable in sf12010860us22 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,184       81.84       81.84
          1 |      1,092       10.92       92.76
          2 |        356        3.56       96.32
          3 |        163        1.63       97.95
          4 |         57        0.57       98.52
          5 |         43        0.43       98.95
          6 |         18        0.18       99.13
          7 |         21        0.21       99.34
          8 |         13        0.13       99.47
          9 |          9        0.09       99.56
         10 |         10        0.10       99.66
         11 |          6        0.06       99.72
         12 |          4        0.04       99.76
         13 |          3        0.03       99.79
         14 |          2        0.02       99.81
         15 |          1        0.01       99.82
         16 |          2        0.02       99.84
         17 |          2        0.02       99.86
         18 |          2        0.02       99.88
         24 |          1        0.01       99.89
         26 |          1        0.01       99.90
         27 |          1        0.01       99.91
         36 |          1        0.01       99.92
         39 |          1        0.01       99.93
         40 |          1        0.01       99.94
         47 |          1        0.01       99.95
         54 |          1        0.01       99.96
         64 |          1        0.01       99.97
         71 |          1        0.01       99.98
         81 |          1        0.01       99.99
         89 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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