Frequencies for first 10,000 rows of pct012c039 variable in sf12000860us18 dataset :

   36 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,430       84.30       84.30
          1 |      1,009       10.09       94.39
          2 |        332        3.32       97.71
          3 |        104        1.04       98.75
          4 |         45        0.45       99.20
          5 |         34        0.34       99.54
          6 |          8        0.08       99.62
          7 |         11        0.11       99.73
          8 |         10        0.10       99.83
          9 |          1        0.01       99.84
         10 |          3        0.03       99.87
         11 |          2        0.02       99.89
         12 |          1        0.01       99.90
         18 |          1        0.01       99.91
         19 |          1        0.01       99.92
         23 |          1        0.01       99.93
         30 |          1        0.01       99.94
         37 |          1        0.01       99.95
         45 |          1        0.01       99.96
         54 |          1        0.01       99.97
         55 |          1        0.01       99.98
         58 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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