Frequencies for first 10,000 rows of pct012l188 variable in sf12000860us27 dataset :

   81 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,128       91.28       91.28
          1 |        515        5.15       96.43
          2 |        161        1.61       98.04
          3 |         76        0.76       98.80
          4 |         40        0.40       99.20
          5 |         20        0.20       99.40
          6 |         13        0.13       99.53
          7 |          9        0.09       99.62
          8 |          5        0.05       99.67
          9 |          9        0.09       99.76
         10 |          5        0.05       99.81
         11 |          1        0.01       99.82
         12 |          3        0.03       99.85
         13 |          1        0.01       99.86
         14 |          1        0.01       99.87
         15 |          4        0.04       99.91
         16 |          1        0.01       99.92
         19 |          2        0.02       99.94
         20 |          1        0.01       99.95
         28 |          1        0.01       99.96
         30 |          1        0.01       99.97
         35 |          1        0.01       99.98
         42 |          1        0.01       99.99
         99 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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