Frequencies for first 10,000 rows of pct012o157 variable in sf12000860us30 dataset :

   50 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,522       75.22       75.22
          1 |      1,297       12.97       88.19
          2 |        476        4.76       92.95
          3 |        252        2.52       95.47
          4 |        146        1.46       96.93
          5 |         82        0.82       97.75
          6 |         54        0.54       98.29
          7 |         32        0.32       98.61
          8 |         34        0.34       98.95
          9 |         22        0.22       99.17
         10 |          9        0.09       99.26
         11 |         11        0.11       99.37
         12 |         16        0.16       99.53
         13 |          8        0.08       99.61
         14 |          3        0.03       99.64
         15 |          5        0.05       99.69
         16 |          9        0.09       99.78
         17 |          4        0.04       99.82
         18 |          8        0.08       99.90
         20 |          2        0.02       99.92
         22 |          1        0.01       99.93
         23 |          2        0.02       99.95
         24 |          1        0.01       99.96
         27 |          2        0.02       99.98
         48 |          1        0.01       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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