Frequencies for first 10,000 rows of pct012k030 variable in sf12000860us26 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,871       88.71       88.71
          1 |        814        8.14       96.85
          2 |        196        1.96       98.81
          3 |         67        0.67       99.48
          4 |         16        0.16       99.64
          5 |          6        0.06       99.70
          6 |          9        0.09       99.79
          7 |          4        0.04       99.83
          8 |          2        0.02       99.85
          9 |          1        0.01       99.86
         10 |          2        0.02       99.88
         11 |          1        0.01       99.89
         13 |          1        0.01       99.90
         17 |          1        0.01       99.91
         23 |          1        0.01       99.92
         24 |          1        0.01       99.93
         32 |          1        0.01       99.94
         36 |          1        0.01       99.95
         44 |          1        0.01       99.96
         54 |          1        0.01       99.97
         59 |          1        0.01       99.98
         69 |          1        0.01       99.99
         93 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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