Frequencies for first 10,000 rows of a2 variable in miacc dataset :

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,175       61.75       61.75
          1 |         54        0.54       62.29
          2 |         78        0.78       63.07
          3 |         82        0.82       63.89
          4 |         71        0.71       64.60
          5 |         77        0.77       65.37
          6 |         90        0.90       66.27
          7 |         86        0.86       67.13
          8 |        113        1.13       68.26
          9 |        119        1.19       69.45
         10 |        119        1.19       70.64
         11 |        150        1.50       72.14
         12 |        150        1.50       73.64
         13 |        149        1.49       75.13
         14 |        170        1.70       76.83
         15 |        176        1.76       78.59
         16 |        168        1.68       80.27
         17 |        175        1.75       82.02
         18 |        161        1.61       83.63
         19 |        145        1.45       85.08
         20 |        152        1.52       86.60
         21 |        185        1.85       88.45
         22 |        160        1.60       90.05
         23 |        136        1.36       91.41
         24 |        105        1.05       92.46
         25 |        102        1.02       93.48
         26 |        104        1.04       94.52
         27 |         91        0.91       95.43
         28 |         76        0.76       96.19
         29 |         71        0.71       96.90
         30 |         64        0.64       97.54
         31 |         43        0.43       97.97
         32 |         43        0.43       98.40
         33 |         20        0.20       98.60
         34 |         25        0.25       98.85
         35 |         18        0.18       99.03
         36 |         28        0.28       99.31
         37 |         15        0.15       99.46
         38 |         10        0.10       99.56
         39 |         11        0.11       99.67
         40 |          5        0.05       99.72
         41 |          7        0.07       99.79
         42 |          6        0.06       99.85
         43 |          2        0.02       99.87
         44 |          1        0.01       99.88
         45 |          2        0.02       99.90
         46 |          2        0.02       99.92
         47 |          1        0.01       99.93
         49 |          3        0.03       99.96
         50 |          1        0.01       99.97
         51 |          2        0.02       99.99
         54 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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