Frequencies for first 10,000 rows of pct012c123 variable in sf12000860us18 dataset :

   16 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,613       86.13       86.13
          1 |        950        9.50       95.63
          2 |        232        2.32       97.95
          3 |         84        0.84       98.79
          4 |         38        0.38       99.17
          5 |         26        0.26       99.43
          6 |         16        0.16       99.59
          7 |         11        0.11       99.70
          8 |          8        0.08       99.78
          9 |          5        0.05       99.83
         10 |          4        0.04       99.87
         11 |          1        0.01       99.88
         16 |          1        0.01       99.89
         19 |          1        0.01       99.90
         23 |          1        0.01       99.91
         26 |          2        0.02       99.93
         35 |          1        0.01       99.94
         39 |          1        0.01       99.95
         50 |          1        0.01       99.96
         55 |          1        0.01       99.97
         62 |          1        0.01       99.98
         68 |          1        0.01       99.99
         78 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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