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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,062       50.62       50.62
          1 |         44        0.44       51.06
          2 |         79        0.79       51.85
          3 |         95        0.95       52.80
          4 |         89        0.89       53.69
          5 |         94        0.94       54.63
          6 |         97        0.97       55.60
          7 |        123        1.23       56.83
          8 |        122        1.22       58.05
          9 |        152        1.52       59.57
         10 |        182        1.82       61.39
         11 |        173        1.73       63.12
         12 |        173        1.73       64.85
         13 |        197        1.97       66.82
         14 |        231        2.31       69.13
         15 |        215        2.15       71.28
         16 |        267        2.67       73.95
         17 |        240        2.40       76.35
         18 |        236        2.36       78.71
         19 |        227        2.27       80.98
         20 |        223        2.23       83.21
         21 |        195        1.95       85.16
         22 |        196        1.96       87.12
         23 |        170        1.70       88.82
         24 |        160        1.60       90.42
         25 |        131        1.31       91.73
         26 |        160        1.60       93.33
         27 |         88        0.88       94.21
         28 |         96        0.96       95.17
         29 |         83        0.83       96.00
         30 |         71        0.71       96.71
         31 |         51        0.51       97.22
         32 |         39        0.39       97.61
         33 |         40        0.40       98.01
         34 |         36        0.36       98.37
         35 |         17        0.17       98.54
         36 |         24        0.24       98.78
         37 |         25        0.25       99.03
         38 |         18        0.18       99.21
         39 |         19        0.19       99.40
         40 |          8        0.08       99.48
         41 |         10        0.10       99.58
         42 |          2        0.02       99.60
         43 |          9        0.09       99.69
         44 |          6        0.06       99.75
         45 |          6        0.06       99.81
         46 |          5        0.05       99.86
         47 |          3        0.03       99.89
         48 |          2        0.02       99.91
         49 |          1        0.01       99.92
         50 |          1        0.01       99.93
         52 |          2        0.02       99.95
         54 |          2        0.02       99.97
         56 |          1        0.01       99.98
         71 |          1        0.01       99.99
         88 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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