Frequencies for first 10,000 rows of pct012c045 variable in sf12000860us18 dataset :

   42 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,482       84.82       84.82
          1 |      1,048       10.48       95.30
          2 |        282        2.82       98.12
          3 |         96        0.96       99.08
          4 |         34        0.34       99.42
          5 |         15        0.15       99.57
          6 |         15        0.15       99.72
          7 |          8        0.08       99.80
          8 |          2        0.02       99.82
          9 |          4        0.04       99.86
         10 |          2        0.02       99.88
         12 |          1        0.01       99.89
         15 |          1        0.01       99.90
         18 |          1        0.01       99.91
         22 |          1        0.01       99.92
         26 |          1        0.01       99.93
         29 |          1        0.01       99.94
         30 |          1        0.01       99.95
         45 |          1        0.01       99.96
         51 |          1        0.01       99.97
         56 |          1        0.01       99.98
         57 |          1        0.01       99.99
         67 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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