Frequencies for first 10,000 rows of pct012c034 variable in sf12010860us22 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,456       84.56       84.56
          1 |        926        9.26       93.82
          2 |        308        3.08       96.90
          3 |        134        1.34       98.24
          4 |         62        0.62       98.86
          5 |         34        0.34       99.20
          6 |         20        0.20       99.40
          7 |         11        0.11       99.51
          8 |          8        0.08       99.59
          9 |         10        0.10       99.69
         10 |          7        0.07       99.76
         11 |          4        0.04       99.80
         12 |          3        0.03       99.83
         13 |          3        0.03       99.86
         14 |          3        0.03       99.89
         17 |          1        0.01       99.90
         18 |          1        0.01       99.91
         23 |          1        0.01       99.92
         25 |          2        0.02       99.94
         31 |          1        0.01       99.95
         37 |          1        0.01       99.96
         40 |          1        0.01       99.97
         51 |          1        0.01       99.98
         55 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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