Frequencies for first 10,000 rows of pct012c126 variable in sf12010860us22 dataset :

   19 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,386       83.86       83.86
          1 |        985        9.85       93.71
          2 |        289        2.89       96.60
          3 |        131        1.31       97.91
          4 |         70        0.70       98.61
          5 |         43        0.43       99.04
          6 |         28        0.28       99.32
          7 |         18        0.18       99.50
          8 |          8        0.08       99.58
          9 |          9        0.09       99.67
         10 |          4        0.04       99.71
         11 |          3        0.03       99.74
         12 |          3        0.03       99.77
         13 |          2        0.02       99.79
         14 |          3        0.03       99.82
         15 |          4        0.04       99.86
         16 |          1        0.01       99.87
         18 |          1        0.01       99.88
         19 |          2        0.02       99.90
         23 |          1        0.01       99.91
         24 |          1        0.01       99.92
         29 |          1        0.01       99.93
         34 |          1        0.01       99.94
         38 |          1        0.01       99.95
         40 |          1        0.01       99.96
         51 |          1        0.01       99.97
         56 |          1        0.01       99.98
         80 |          1        0.01       99.99
        100 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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