Frequencies for first 10,000 rows of pct012c019 variable in sf12000860us18 dataset :

   16 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,529       85.29       85.29
          1 |        994        9.94       95.23
          2 |        279        2.79       98.02
          3 |         91        0.91       98.93
          4 |         35        0.35       99.28
          5 |         16        0.16       99.44
          6 |         12        0.12       99.56
          7 |          8        0.08       99.64
          8 |          7        0.07       99.71
          9 |          7        0.07       99.78
         10 |          2        0.02       99.80
         11 |          6        0.06       99.86
         12 |          3        0.03       99.89
         14 |          1        0.01       99.90
         21 |          1        0.01       99.91
         22 |          1        0.01       99.92
         33 |          1        0.01       99.93
         34 |          1        0.01       99.94
         43 |          1        0.01       99.95
         47 |          1        0.01       99.96
         55 |          1        0.01       99.97
         59 |          1        0.01       99.98
         62 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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