Frequencies for first 10,000 rows of a4 variable in miacc dataset :

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,842       58.42       58.42
          1 |         47        0.47       58.89
          2 |         80        0.80       59.69
          3 |         81        0.81       60.50
          4 |         91        0.91       61.41
          5 |         96        0.96       62.37
          6 |         91        0.91       63.28
          7 |        124        1.24       64.52
          8 |        121        1.21       65.73
          9 |        131        1.31       67.04
         10 |        144        1.44       68.48
         11 |        139        1.39       69.87
         12 |        185        1.85       71.72
         13 |        182        1.82       73.54
         14 |        162        1.62       75.16
         15 |        182        1.82       76.98
         16 |        177        1.77       78.75
         17 |        183        1.83       80.58
         18 |        186        1.86       82.44
         19 |        183        1.83       84.27
         20 |        165        1.65       85.92
         21 |        193        1.93       87.85
         22 |        168        1.68       89.53
         23 |        128        1.28       90.81
         24 |        130        1.30       92.11
         25 |         99        0.99       93.10
         26 |        113        1.13       94.23
         27 |        108        1.08       95.31
         28 |         83        0.83       96.14
         29 |         65        0.65       96.79
         30 |         59        0.59       97.38
         31 |         44        0.44       97.82
         32 |         31        0.31       98.13
         33 |         36        0.36       98.49
         34 |         25        0.25       98.74
         35 |         27        0.27       99.01
         36 |         18        0.18       99.19
         37 |         10        0.10       99.29
         38 |         11        0.11       99.40
         39 |          8        0.08       99.48
         40 |         13        0.13       99.61
         41 |          6        0.06       99.67
         42 |          5        0.05       99.72
         43 |          7        0.07       99.79
         44 |          4        0.04       99.83
         45 |          5        0.05       99.88
         46 |          1        0.01       99.89
         47 |          2        0.02       99.91
         48 |          5        0.05       99.96
         51 |          2        0.02       99.98
         52 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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