Frequencies for first 10,000 rows of pct012o028 variable in sf12010860us34 dataset :

   25 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,813       68.13       68.13
          1 |      1,315       13.15       81.28
          2 |        573        5.73       87.01
          3 |        355        3.55       90.56
          4 |        270        2.70       93.26
          5 |        155        1.55       94.81
          6 |        126        1.26       96.07
          7 |         91        0.91       96.98
          8 |         74        0.74       97.72
          9 |         50        0.50       98.22
         10 |         35        0.35       98.57
         11 |         24        0.24       98.81
         12 |         24        0.24       99.05
         13 |         16        0.16       99.21
         14 |         22        0.22       99.43
         15 |         15        0.15       99.58
         16 |          9        0.09       99.67
         17 |          5        0.05       99.72
         18 |          7        0.07       99.79
         19 |          3        0.03       99.82
         20 |          4        0.04       99.86
         21 |          2        0.02       99.88
         22 |          1        0.01       99.89
         23 |          2        0.02       99.91
         24 |          1        0.01       99.92
         25 |          4        0.04       99.96
         27 |          1        0.01       99.97
         29 |          1        0.01       99.98
         32 |          1        0.01       99.99
         65 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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