Frequencies for first 10,000 rows of pct013c031 variable in sf12000860us31 dataset :

  18 and 19 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,082       80.82       80.82
          1 |      1,120       11.20       92.02
          2 |        387        3.87       95.89
          3 |        176        1.76       97.65
          4 |         64        0.64       98.29
          5 |         37        0.37       98.66
          6 |         34        0.34       99.00
          7 |         16        0.16       99.16
          8 |         15        0.15       99.31
          9 |         13        0.13       99.44
         10 |         10        0.10       99.54
         11 |          5        0.05       99.59
         12 |          4        0.04       99.63
         13 |          7        0.07       99.70
         14 |          6        0.06       99.76
         15 |          2        0.02       99.78
         17 |          3        0.03       99.81
         18 |          4        0.04       99.85
         19 |          1        0.01       99.86
         20 |          1        0.01       99.87
         24 |          1        0.01       99.88
         28 |          1        0.01       99.89
         32 |          1        0.01       99.90
         41 |          1        0.01       99.91
         45 |          1        0.01       99.92
         46 |          1        0.01       99.93
         62 |          1        0.01       99.94
         68 |          1        0.01       99.95
        100 |          1        0.01       99.96
        108 |          1        0.01       99.97
        127 |          1        0.01       99.98
        137 |          1        0.01       99.99
        186 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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