Frequencies for first 10,000 rows of pct012c025 variable in sf12000860us18 dataset :

   22 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,562       85.62       85.62
          1 |        914        9.14       94.76
          2 |        273        2.73       97.49
          3 |        110        1.10       98.59
          4 |         53        0.53       99.12
          5 |         27        0.27       99.39
          6 |         18        0.18       99.57
          7 |         10        0.10       99.67
          8 |         10        0.10       99.77
          9 |          4        0.04       99.81
         10 |          1        0.01       99.82
         11 |          1        0.01       99.83
         12 |          1        0.01       99.84
         13 |          1        0.01       99.85
         14 |          2        0.02       99.87
         16 |          2        0.02       99.89
         18 |          1        0.01       99.90
         27 |          1        0.01       99.91
         28 |          1        0.01       99.92
         29 |          1        0.01       99.93
         30 |          1        0.01       99.94
         31 |          1        0.01       99.95
         41 |          1        0.01       99.96
         49 |          1        0.01       99.97
         61 |          1        0.01       99.98
         66 |          1        0.01       99.99
         85 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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