Frequencies for first 10,000 rows of pct012f075 variable in sf12000860us21 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,211       92.11       92.11
          1 |        427        4.27       96.38
          2 |        118        1.18       97.56
          3 |         65        0.65       98.21
          4 |         41        0.41       98.62
          5 |         23        0.23       98.85
          6 |         22        0.22       99.07
          7 |         16        0.16       99.23
          8 |         16        0.16       99.39
          9 |          6        0.06       99.45
         10 |          8        0.08       99.53
         11 |          2        0.02       99.55
         12 |          5        0.05       99.60
         13 |          2        0.02       99.62
         14 |          3        0.03       99.65
         15 |          4        0.04       99.69
         16 |          7        0.07       99.76
         17 |          4        0.04       99.80
         18 |          4        0.04       99.84
         19 |          1        0.01       99.85
         20 |          1        0.01       99.86
         21 |          4        0.04       99.90
         23 |          1        0.01       99.91
         26 |          1        0.01       99.92
         27 |          1        0.01       99.93
         28 |          4        0.04       99.97
         31 |          2        0.02       99.99
         35 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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