Frequencies for first 10,000 rows of a2 variable in miacc dataset :

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,704       57.04       57.04
          1 |         61        0.61       57.65
          2 |         92        0.92       58.57
          3 |         65        0.65       59.22
          4 |         87        0.87       60.09
          5 |         86        0.86       60.95
          6 |         99        0.99       61.94
          7 |        136        1.36       63.30
          8 |        127        1.27       64.57
          9 |        133        1.33       65.90
         10 |        138        1.38       67.28
         11 |        142        1.42       68.70
         12 |        172        1.72       70.42
         13 |        212        2.12       72.54
         14 |        169        1.69       74.23
         15 |        176        1.76       75.99
         16 |        191        1.91       77.90
         17 |        195        1.95       79.85
         18 |        204        2.04       81.89
         19 |        194        1.94       83.83
         20 |        180        1.80       85.63
         21 |        177        1.77       87.40
         22 |        179        1.79       89.19
         23 |        149        1.49       90.68
         24 |        153        1.53       92.21
         25 |        106        1.06       93.27
         26 |        110        1.10       94.37
         27 |        107        1.07       95.44
         28 |         80        0.80       96.24
         29 |         66        0.66       96.90
         30 |         61        0.61       97.51
         31 |         44        0.44       97.95
         32 |         27        0.27       98.22
         33 |         36        0.36       98.58
         34 |         23        0.23       98.81
         35 |         27        0.27       99.08
         36 |         18        0.18       99.26
         37 |         16        0.16       99.42
         38 |          9        0.09       99.51
         39 |          9        0.09       99.60
         40 |          8        0.08       99.68
         41 |          3        0.03       99.71
         42 |          6        0.06       99.77
         43 |          5        0.05       99.82
         44 |          5        0.05       99.87
         45 |          1        0.01       99.88
         46 |          3        0.03       99.91
         47 |          1        0.01       99.92
         48 |          1        0.01       99.93
         50 |          2        0.02       99.95
         51 |          2        0.02       99.97
         55 |          1        0.01       99.98
         60 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016