Frequencies for first 10,000 rows of pct013c007 variable in sf12000860us31 dataset :

  18 and 19 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,910       79.10       79.10
          1 |      1,195       11.95       91.05
          2 |        416        4.16       95.21
          3 |        187        1.87       97.08
          4 |         96        0.96       98.04
          5 |         51        0.51       98.55
          6 |         35        0.35       98.90
          7 |         29        0.29       99.19
          8 |         16        0.16       99.35
          9 |          9        0.09       99.44
         10 |          8        0.08       99.52
         11 |          7        0.07       99.59
         12 |          5        0.05       99.64
         13 |          3        0.03       99.67
         14 |          2        0.02       99.69
         15 |          5        0.05       99.74
         16 |          4        0.04       99.78
         17 |          1        0.01       99.79
         18 |          3        0.03       99.82
         19 |          1        0.01       99.83
         20 |          1        0.01       99.84
         21 |          1        0.01       99.85
         22 |          2        0.02       99.87
         28 |          2        0.02       99.89
         32 |          1        0.01       99.90
         33 |          1        0.01       99.91
         47 |          1        0.01       99.92
         51 |          1        0.01       99.93
         59 |          1        0.01       99.94
         74 |          1        0.01       99.95
         88 |          1        0.01       99.96
         96 |          1        0.01       99.97
         97 |          1        0.01       99.98
        139 |          1        0.01       99.99
        149 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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