Frequencies for first 10,000 rows of pct012o136 variable in sf12000860us30 dataset :

   29 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,312       73.12       73.12
          1 |      1,131       11.31       84.43
          2 |        486        4.86       89.29
          3 |        316        3.16       92.45
          4 |        171        1.71       94.16
          5 |        132        1.32       95.48
          6 |         86        0.86       96.34
          7 |         65        0.65       96.99
          8 |         54        0.54       97.53
          9 |         31        0.31       97.84
         10 |         35        0.35       98.19
         11 |         28        0.28       98.47
         12 |         20        0.20       98.67
         13 |         21        0.21       98.88
         14 |         14        0.14       99.02
         15 |         17        0.17       99.19
         16 |          4        0.04       99.23
         17 |         12        0.12       99.35
         18 |          9        0.09       99.44
         19 |          6        0.06       99.50
         20 |          7        0.07       99.57
         21 |          4        0.04       99.61
         22 |          7        0.07       99.68
         23 |          5        0.05       99.73
         24 |          2        0.02       99.75
         25 |          2        0.02       99.77
         26 |          3        0.03       99.80
         27 |          5        0.05       99.85
         28 |          3        0.03       99.88
         29 |          2        0.02       99.90
         30 |          2        0.02       99.92
         31 |          1        0.01       99.93
         33 |          2        0.02       99.95
         35 |          1        0.01       99.96
         42 |          1        0.01       99.97
         47 |          1        0.01       99.98
         49 |          1        0.01       99.99
         90 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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