Frequencies for first 10,000 rows of pct012o024 variable in sf12000860us30 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,224       72.24       72.24
          1 |      1,161       11.61       83.85
          2 |        473        4.73       88.58
          3 |        314        3.14       91.72
          4 |        205        2.05       93.77
          5 |        134        1.34       95.11
          6 |         91        0.91       96.02
          7 |         86        0.86       96.88
          8 |         48        0.48       97.36
          9 |         51        0.51       97.87
         10 |         33        0.33       98.20
         11 |         28        0.28       98.48
         12 |         20        0.20       98.68
         13 |         18        0.18       98.86
         14 |         11        0.11       98.97
         15 |          8        0.08       99.05
         16 |         19        0.19       99.24
         17 |          8        0.08       99.32
         18 |          5        0.05       99.37
         19 |          6        0.06       99.43
         20 |          5        0.05       99.48
         21 |          5        0.05       99.53
         22 |          4        0.04       99.57
         23 |          4        0.04       99.61
         24 |          2        0.02       99.63
         25 |          2        0.02       99.65
         26 |          2        0.02       99.67
         27 |          4        0.04       99.71
         28 |          5        0.05       99.76
         29 |          3        0.03       99.79
         30 |          4        0.04       99.83
         32 |          1        0.01       99.84
         33 |          1        0.01       99.85
         34 |          1        0.01       99.86
         35 |          1        0.01       99.87
         37 |          1        0.01       99.88
         38 |          1        0.01       99.89
         40 |          2        0.02       99.91
         41 |          1        0.01       99.92
         44 |          3        0.03       99.95
         45 |          1        0.01       99.96
         47 |          1        0.01       99.97
         54 |          2        0.02       99.99
         80 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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