Frequencies for first 10,000 rows of pct012k018 variable in sf12010860us30 dataset :

   15 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,810       88.10       88.10
          1 |        819        8.19       96.29
          2 |        221        2.21       98.50
          3 |         80        0.80       99.30
          4 |         24        0.24       99.54
          5 |          9        0.09       99.63
          6 |          9        0.09       99.72
          7 |          4        0.04       99.76
          8 |          4        0.04       99.80
          9 |          1        0.01       99.81
         10 |          2        0.02       99.83
         11 |          1        0.01       99.84
         12 |          2        0.02       99.86
         13 |          1        0.01       99.87
         15 |          1        0.01       99.88
         16 |          1        0.01       99.89
         22 |          1        0.01       99.90
         26 |          1        0.01       99.91
         30 |          1        0.01       99.92
         37 |          1        0.01       99.93
         50 |          1        0.01       99.94
         52 |          1        0.01       99.95
         53 |          1        0.01       99.96
         64 |          1        0.01       99.97
         77 |          1        0.01       99.98
         86 |          1        0.01       99.99
        102 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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