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

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,924       49.24       49.24
          1 |         59        0.59       49.83
          2 |         98        0.98       50.81
          3 |        101        1.01       51.82
          4 |         90        0.90       52.72
          5 |        100        1.00       53.72
          6 |        125        1.25       54.97
          7 |        125        1.25       56.22
          8 |        130        1.30       57.52
          9 |        166        1.66       59.18
         10 |        164        1.64       60.82
         11 |        198        1.98       62.80
         12 |        190        1.90       64.70
         13 |        192        1.92       66.62
         14 |        202        2.02       68.64
         15 |        246        2.46       71.10
         16 |        251        2.51       73.61
         17 |        267        2.67       76.28
         18 |        232        2.32       78.60
         19 |        229        2.29       80.89
         20 |        239        2.39       83.28
         21 |        220        2.20       85.48
         22 |        201        2.01       87.49
         23 |        187        1.87       89.36
         24 |        167        1.67       91.03
         25 |        145        1.45       92.48
         26 |        133        1.33       93.81
         27 |        122        1.22       95.03
         28 |         88        0.88       95.91
         29 |         71        0.71       96.62
         30 |         71        0.71       97.33
         31 |         49        0.49       97.82
         32 |         35        0.35       98.17
         33 |         34        0.34       98.51
         34 |         22        0.22       98.73
         35 |         27        0.27       99.00
         36 |         16        0.16       99.16
         37 |         19        0.19       99.35
         38 |         13        0.13       99.48
         39 |          9        0.09       99.57
         40 |         11        0.11       99.68
         41 |          3        0.03       99.71
         42 |          4        0.04       99.75
         43 |          5        0.05       99.80
         44 |          4        0.04       99.84
         45 |          3        0.03       99.87
         46 |          2        0.02       99.89
         47 |          3        0.03       99.92
         48 |          2        0.02       99.94
         49 |          1        0.01       99.95
         52 |          1        0.01       99.96
         53 |          1        0.01       99.97
         54 |          1        0.01       99.98
         56 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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