Frequencies for first 10,000 rows of pct012c021 variable in sf12000860us18 dataset :

   18 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,486       84.86       84.86
          1 |      1,013       10.13       94.99
          2 |        272        2.72       97.71
          3 |        103        1.03       98.74
          4 |         43        0.43       99.17
          5 |         28        0.28       99.45
          6 |         14        0.14       99.59
          7 |          8        0.08       99.67
          8 |          6        0.06       99.73
          9 |          8        0.08       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
         14 |          2        0.02       99.89
         15 |          1        0.01       99.90
         16 |          1        0.01       99.91
         24 |          1        0.01       99.92
         26 |          1        0.01       99.93
         27 |          1        0.01       99.94
         41 |          1        0.01       99.95
         48 |          1        0.01       99.96
         51 |          1        0.01       99.97
         56 |          1        0.01       99.98
         66 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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