Frequencies for first 10,000 rows of pct012k159 variable in sf12010860us30 dataset :

   52 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,592       85.92       85.92
          1 |      1,010       10.10       96.02
          2 |        244        2.44       98.46
          3 |         81        0.81       99.27
          4 |         26        0.26       99.53
          5 |         14        0.14       99.67
          6 |          5        0.05       99.72
          7 |          5        0.05       99.77
          8 |          6        0.06       99.83
          9 |          2        0.02       99.85
         12 |          2        0.02       99.87
         13 |          1        0.01       99.88
         17 |          2        0.02       99.90
         19 |          1        0.01       99.91
         20 |          1        0.01       99.92
         27 |          1        0.01       99.93
         32 |          1        0.01       99.94
         33 |          1        0.01       99.95
         49 |          1        0.01       99.96
         52 |          1        0.01       99.97
         59 |          1        0.01       99.98
         61 |          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