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

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,013       60.13       60.13
          1 |         72        0.72       60.85
          2 |         86        0.86       61.71
          3 |         68        0.68       62.39
          4 |         70        0.70       63.09
          5 |         75        0.75       63.84
          6 |         76        0.76       64.60
          7 |         78        0.78       65.38
          8 |        106        1.06       66.44
          9 |        129        1.29       67.73
         10 |        136        1.36       69.09
         11 |        139        1.39       70.48
         12 |        157        1.57       72.05
         13 |        165        1.65       73.70
         14 |        139        1.39       75.09
         15 |        174        1.74       76.83
         16 |        185        1.85       78.68
         17 |        183        1.83       80.51
         18 |        185        1.85       82.36
         19 |        198        1.98       84.34
         20 |        158        1.58       85.92
         21 |        160        1.60       87.52
         22 |        164        1.64       89.16
         23 |        153        1.53       90.69
         24 |        139        1.39       92.08
         25 |        109        1.09       93.17
         26 |        100        1.00       94.17
         27 |         80        0.80       94.97
         28 |         78        0.78       95.75
         29 |         60        0.60       96.35
         30 |         61        0.61       96.96
         31 |         47        0.47       97.43
         32 |         30        0.30       97.73
         33 |         35        0.35       98.08
         34 |         32        0.32       98.40
         35 |         29        0.29       98.69
         36 |         26        0.26       98.95
         37 |         22        0.22       99.17
         38 |          9        0.09       99.26
         39 |         10        0.10       99.36
         40 |         12        0.12       99.48
         41 |         14        0.14       99.62
         42 |         10        0.10       99.72
         43 |          5        0.05       99.77
         44 |          5        0.05       99.82
         45 |          1        0.01       99.83
         46 |          3        0.03       99.86
         47 |          1        0.01       99.87
         48 |          1        0.01       99.88
         50 |          1        0.01       99.89
         51 |          1        0.01       99.90
         54 |          3        0.03       99.93
         59 |          1        0.01       99.94
         60 |          2        0.02       99.96
         61 |          1        0.01       99.97
         63 |          1        0.01       99.98
         65 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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