Frequencies for first 10,000 rows of pct012c156 variable in sf12000860us18 dataset :

   49 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,713       87.13       87.13
          1 |        912        9.12       96.25
          2 |        229        2.29       98.54
          3 |         71        0.71       99.25
          4 |         32        0.32       99.57
          5 |          9        0.09       99.66
          6 |         10        0.10       99.76
          7 |          4        0.04       99.80
          8 |          1        0.01       99.81
          9 |          6        0.06       99.87
         11 |          3        0.03       99.90
         17 |          1        0.01       99.91
         18 |          1        0.01       99.92
         19 |          1        0.01       99.93
         26 |          1        0.01       99.94
         33 |          1        0.01       99.95
         34 |          1        0.01       99.96
         35 |          1        0.01       99.97
         50 |          1        0.01       99.98
         58 |          1        0.01       99.99
         60 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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