Frequencies for first 10,000 rows of pct012n154 variable in sf12000860us29 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,392       93.92       93.92
          1 |        422        4.22       98.14
          2 |         90        0.90       99.04
          3 |         36        0.36       99.40
          4 |         18        0.18       99.58
          5 |         12        0.12       99.70
          6 |          7        0.07       99.77
          7 |          2        0.02       99.79
          8 |          3        0.03       99.82
          9 |          4        0.04       99.86
         10 |          1        0.01       99.87
         11 |          3        0.03       99.90
         12 |          1        0.01       99.91
         14 |          1        0.01       99.92
         17 |          2        0.02       99.94
         18 |          1        0.01       99.95
         20 |          1        0.01       99.96
         21 |          1        0.01       99.97
         22 |          1        0.01       99.98
         23 |          1        0.01       99.99
         25 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017