Frequencies for first 10,000 rows of pct012k042 variable in sf12000860us26 dataset :

   39 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,633       86.33       86.33
          1 |      1,025       10.25       96.58
          2 |        213        2.13       98.71
          3 |         71        0.71       99.42
          4 |         18        0.18       99.60
          5 |         10        0.10       99.70
          6 |          8        0.08       99.78
          7 |          5        0.05       99.83
          8 |          4        0.04       99.87
         11 |          1        0.01       99.88
         12 |          2        0.02       99.90
         13 |          1        0.01       99.91
         19 |          1        0.01       99.92
         24 |          1        0.01       99.93
         26 |          1        0.01       99.94
         35 |          1        0.01       99.95
         36 |          2        0.02       99.97
         52 |          1        0.01       99.98
         64 |          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