Frequencies for first 10,000 rows of p012g033 variable in sf12000860us6 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,861       68.61       68.61
          1 |      1,161       11.61       80.22
          2 |        522        5.22       85.44
          3 |        294        2.94       88.38
          4 |        202        2.02       90.40
          5 |        149        1.49       91.89
          6 |        117        1.17       93.06
          7 |         86        0.86       93.92
          8 |         80        0.80       94.72
          9 |         68        0.68       95.40
         10 |         46        0.46       95.86
         11 |         40        0.40       96.26
         12 |         44        0.44       96.70
         13 |         42        0.42       97.12
         14 |         41        0.41       97.53
         15 |         30        0.30       97.83
         16 |         23        0.23       98.06
         17 |         20        0.20       98.26
         18 |         13        0.13       98.39
         19 |         18        0.18       98.57
         20 |          5        0.05       98.62
         21 |         15        0.15       98.77
         22 |          8        0.08       98.85
         23 |          9        0.09       98.94
         24 |          4        0.04       98.98
         25 |         10        0.10       99.08
         26 |         10        0.10       99.18
         27 |          8        0.08       99.26
         28 |          4        0.04       99.30
         29 |          2        0.02       99.32
         30 |          5        0.05       99.37
         31 |          2        0.02       99.39
         32 |          5        0.05       99.44
         33 |          5        0.05       99.49
         34 |          4        0.04       99.53
         35 |          3        0.03       99.56
         36 |          2        0.02       99.58
         37 |          4        0.04       99.62
         38 |          4        0.04       99.66
         39 |          2        0.02       99.68
         40 |          5        0.05       99.73
         41 |          3        0.03       99.76
         42 |          3        0.03       99.79
         43 |          2        0.02       99.81
         44 |          1        0.01       99.82
         45 |          2        0.02       99.84
         46 |          2        0.02       99.86
         47 |          1        0.01       99.87
         48 |          2        0.02       99.89
         51 |          1        0.01       99.90
         52 |          1        0.01       99.91
         55 |          1        0.01       99.92
         57 |          3        0.03       99.95
         59 |          1        0.01       99.96
         63 |          2        0.02       99.98
         85 |          1        0.01       99.99
         86 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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