Frequencies for first 10,000 rows of pct013g033 variable in sf12000860us32 dataset :

   21 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,970       69.70       69.70
          1 |      1,167       11.67       81.37
          2 |        522        5.22       86.59
          3 |        283        2.83       89.42
          4 |        201        2.01       91.43
          5 |        129        1.29       92.72
          6 |         99        0.99       93.71
          7 |         82        0.82       94.53
          8 |         83        0.83       95.36
          9 |         60        0.60       95.96
         10 |         42        0.42       96.38
         11 |         35        0.35       96.73
         12 |         42        0.42       97.15
         13 |         35        0.35       97.50
         14 |         35        0.35       97.85
         15 |         29        0.29       98.14
         16 |         20        0.20       98.34
         17 |         16        0.16       98.50
         18 |         12        0.12       98.62
         19 |         11        0.11       98.73
         20 |          2        0.02       98.75
         21 |         15        0.15       98.90
         22 |          9        0.09       98.99
         23 |          7        0.07       99.06
         24 |          2        0.02       99.08
         25 |         12        0.12       99.20
         26 |          6        0.06       99.26
         27 |         10        0.10       99.36
         28 |          4        0.04       99.40
         29 |          3        0.03       99.43
         30 |          4        0.04       99.47
         31 |          4        0.04       99.51
         32 |          4        0.04       99.55
         33 |          4        0.04       99.59
         34 |          5        0.05       99.64
         35 |          2        0.02       99.66
         36 |          3        0.03       99.69
         37 |          2        0.02       99.71
         38 |          6        0.06       99.77
         39 |          4        0.04       99.81
         40 |          3        0.03       99.84
         41 |          2        0.02       99.86
         42 |          1        0.01       99.87
         45 |          3        0.03       99.90
         46 |          2        0.02       99.92
         47 |          1        0.01       99.93
         51 |          1        0.01       99.94
         52 |          1        0.01       99.95
         54 |          1        0.01       99.96
         55 |          1        0.01       99.97
         63 |          1        0.01       99.98
         74 |          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