Frequencies for first 10,000 rows of pct012k150 variable in sf12010860us30 dataset :

   43 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,718       87.18       87.18
          1 |        929        9.29       96.47
          2 |        218        2.18       98.65
          3 |         68        0.68       99.33
          4 |         23        0.23       99.56
          5 |         19        0.19       99.75
          6 |          3        0.03       99.78
          7 |          6        0.06       99.84
          9 |          1        0.01       99.85
         10 |          2        0.02       99.87
         11 |          2        0.02       99.89
         17 |          2        0.02       99.91
         19 |          1        0.01       99.92
         23 |          1        0.01       99.93
         33 |          1        0.01       99.94
         34 |          1        0.01       99.95
         36 |          1        0.01       99.96
         44 |          1        0.01       99.97
         65 |          1        0.01       99.98
         67 |          1        0.01       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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