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

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,569       45.69       45.69
          1 |         70        0.70       46.39
          2 |         96        0.96       47.35
          3 |        101        1.01       48.36
          4 |        101        1.01       49.37
          5 |        125        1.25       50.62
          6 |        141        1.41       52.03
          7 |        173        1.73       53.76
          8 |        140        1.40       55.16
          9 |        196        1.96       57.12
         10 |        148        1.48       58.60
         11 |        198        1.98       60.58
         12 |        187        1.87       62.45
         13 |        223        2.23       64.68
         14 |        239        2.39       67.07
         15 |        244        2.44       69.51
         16 |        274        2.74       72.25
         17 |        282        2.82       75.07
         18 |        249        2.49       77.56
         19 |        251        2.51       80.07
         20 |        226        2.26       82.33
         21 |        228        2.28       84.61
         22 |        223        2.23       86.84
         23 |        170        1.70       88.54
         24 |        162        1.62       90.16
         25 |        156        1.56       91.72
         26 |        139        1.39       93.11
         27 |        110        1.10       94.21
         28 |         98        0.98       95.19
         29 |         92        0.92       96.11
         30 |         74        0.74       96.85
         31 |         57        0.57       97.42
         32 |         54        0.54       97.96
         33 |         31        0.31       98.27
         34 |         40        0.40       98.67
         35 |         23        0.23       98.90
         36 |         19        0.19       99.09
         37 |         18        0.18       99.27
         38 |          6        0.06       99.33
         39 |         13        0.13       99.46
         40 |         12        0.12       99.58
         41 |          7        0.07       99.65
         42 |          4        0.04       99.69
         43 |          6        0.06       99.75
         44 |          3        0.03       99.78
         45 |          4        0.04       99.82
         46 |          3        0.03       99.85
         47 |          2        0.02       99.87
         48 |          2        0.02       99.89
         49 |          5        0.05       99.94
         51 |          1        0.01       99.95
         52 |          1        0.01       99.96
         53 |          1        0.01       99.97
         57 |          1        0.01       99.98
         58 |          1        0.01       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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