Frequencies for first 10,000 rows of p012g009 variable in sf12000860us6 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,805       68.05       68.05
          1 |      1,168       11.68       79.73
          2 |        502        5.02       84.75
          3 |        330        3.30       88.05
          4 |        225        2.25       90.30
          5 |        155        1.55       91.85
          6 |        112        1.12       92.97
          7 |         88        0.88       93.85
          8 |         87        0.87       94.72
          9 |         61        0.61       95.33
         10 |         52        0.52       95.85
         11 |         47        0.47       96.32
         12 |         48        0.48       96.80
         13 |         32        0.32       97.12
         14 |         28        0.28       97.40
         15 |         25        0.25       97.65
         16 |         26        0.26       97.91
         17 |         17        0.17       98.08
         18 |         15        0.15       98.23
         19 |         10        0.10       98.33
         20 |         11        0.11       98.44
         21 |         17        0.17       98.61
         22 |         11        0.11       98.72
         23 |         11        0.11       98.83
         24 |         10        0.10       98.93
         25 |          7        0.07       99.00
         26 |          7        0.07       99.07
         27 |          7        0.07       99.14
         28 |          7        0.07       99.21
         29 |          5        0.05       99.26
         30 |          5        0.05       99.31
         31 |          1        0.01       99.32
         32 |          2        0.02       99.34
         33 |          3        0.03       99.37
         34 |          5        0.05       99.42
         35 |          4        0.04       99.46
         36 |          5        0.05       99.51
         37 |          3        0.03       99.54
         38 |          2        0.02       99.56
         39 |          1        0.01       99.57
         40 |          5        0.05       99.62
         41 |          1        0.01       99.63
         42 |          7        0.07       99.70
         43 |          4        0.04       99.74
         44 |          1        0.01       99.75
         45 |          3        0.03       99.78
         46 |          3        0.03       99.81
         47 |          3        0.03       99.84
         48 |          2        0.02       99.86
         49 |          3        0.03       99.89
         54 |          1        0.01       99.90
         58 |          1        0.01       99.91
         60 |          1        0.01       99.92
         62 |          1        0.01       99.93
         63 |          1        0.01       99.94
         67 |          2        0.02       99.96
         72 |          1        0.01       99.97
         96 |          1        0.01       99.98
        109 |          1        0.01       99.99
        188 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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