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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,999       59.99       59.99
          1 |         75        0.75       60.74
          2 |         89        0.89       61.63
          3 |         66        0.66       62.29
          4 |         69        0.69       62.98
          5 |         70        0.70       63.68
          6 |         66        0.66       64.34
          7 |         80        0.80       65.14
          8 |        105        1.05       66.19
          9 |        121        1.21       67.40
         10 |        137        1.37       68.77
         11 |        172        1.72       70.49
         12 |        151        1.51       72.00
         13 |        170        1.70       73.70
         14 |        154        1.54       75.24
         15 |        175        1.75       76.99
         16 |        178        1.78       78.77
         17 |        179        1.79       80.56
         18 |        169        1.69       82.25
         19 |        198        1.98       84.23
         20 |        172        1.72       85.95
         21 |        162        1.62       87.57
         22 |        170        1.70       89.27
         23 |        142        1.42       90.69
         24 |        138        1.38       92.07
         25 |        100        1.00       93.07
         26 |        100        1.00       94.07
         27 |         84        0.84       94.91
         28 |         84        0.84       95.75
         29 |         65        0.65       96.40
         30 |         60        0.60       97.00
         31 |         45        0.45       97.45
         32 |         39        0.39       97.84
         33 |         32        0.32       98.16
         34 |         32        0.32       98.48
         35 |         29        0.29       98.77
         36 |         27        0.27       99.04
         37 |         13        0.13       99.17
         38 |          9        0.09       99.26
         39 |         10        0.10       99.36
         40 |         15        0.15       99.51
         41 |         11        0.11       99.62
         42 |          8        0.08       99.70
         43 |          7        0.07       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 |          2        0.02       99.91
         52 |          1        0.01       99.92
         54 |          2        0.02       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