Frequencies for first 10,000 rows of pct012l081 variable in sf12000860us27 dataset :

   78 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,078       90.78       90.78
          1 |        546        5.46       96.24
          2 |        161        1.61       97.85
          3 |         80        0.80       98.65
          4 |         49        0.49       99.14
          5 |         18        0.18       99.32
          6 |         19        0.19       99.51
          7 |          7        0.07       99.58
          8 |         13        0.13       99.71
          9 |          4        0.04       99.75
         10 |          2        0.02       99.77
         12 |          2        0.02       99.79
         13 |          2        0.02       99.81
         14 |          3        0.03       99.84
         15 |          3        0.03       99.87
         16 |          1        0.01       99.88
         17 |          2        0.02       99.90
         18 |          1        0.01       99.91
         21 |          1        0.01       99.92
         22 |          1        0.01       99.93
         24 |          2        0.02       99.95
         25 |          1        0.01       99.96
         33 |          1        0.01       99.97
         34 |          1        0.01       99.98
         69 |          1        0.01       99.99
        102 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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