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

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,292       52.92       52.92
          1 |         58        0.58       53.50
          2 |         87        0.87       54.37
          3 |         92        0.92       55.29
          4 |        101        1.01       56.30
          5 |        102        1.02       57.32
          6 |        111        1.11       58.43
          7 |        124        1.24       59.67
          8 |        132        1.32       60.99
          9 |        147        1.47       62.46
         10 |        159        1.59       64.05
         11 |        161        1.61       65.66
         12 |        180        1.80       67.46
         13 |        195        1.95       69.41
         14 |        231        2.31       71.72
         15 |        246        2.46       74.18
         16 |        211        2.11       76.29
         17 |        208        2.08       78.37
         18 |        224        2.24       80.61
         19 |        204        2.04       82.65
         20 |        215        2.15       84.80
         21 |        196        1.96       86.76
         22 |        184        1.84       88.60
         23 |        160        1.60       90.20
         24 |        149        1.49       91.69
         25 |        137        1.37       93.06
         26 |        103        1.03       94.09
         27 |        108        1.08       95.17
         28 |         91        0.91       96.08
         29 |         83        0.83       96.91
         30 |         55        0.55       97.46
         31 |         39        0.39       97.85
         32 |         44        0.44       98.29
         33 |         30        0.30       98.59
         34 |         32        0.32       98.91
         35 |         21        0.21       99.12
         36 |         19        0.19       99.31
         37 |         18        0.18       99.49
         38 |         13        0.13       99.62
         39 |          8        0.08       99.70
         40 |          6        0.06       99.76
         41 |          9        0.09       99.85
         43 |          3        0.03       99.88
         44 |          3        0.03       99.91
         45 |          1        0.01       99.92
         46 |          2        0.02       99.94
         48 |          1        0.01       99.95
         49 |          1        0.01       99.96
         52 |          2        0.02       99.98
         56 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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