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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,884       58.84       58.84
          1 |         49        0.49       59.33
          2 |         94        0.94       60.27
          3 |         74        0.74       61.01
          4 |         65        0.65       61.66
          5 |         79        0.79       62.45
          6 |        101        1.01       63.46
          7 |        123        1.23       64.69
          8 |        127        1.27       65.96
          9 |        129        1.29       67.25
         10 |        127        1.27       68.52
         11 |        146        1.46       69.98
         12 |        149        1.49       71.47
         13 |        158        1.58       73.05
         14 |        197        1.97       75.02
         15 |        198        1.98       77.00
         16 |        180        1.80       78.80
         17 |        169        1.69       80.49
         18 |        204        2.04       82.53
         19 |        188        1.88       84.41
         20 |        163        1.63       86.04
         21 |        189        1.89       87.93
         22 |        149        1.49       89.42
         23 |        141        1.41       90.83
         24 |        139        1.39       92.22
         25 |         99        0.99       93.21
         26 |        109        1.09       94.30
         27 |         87        0.87       95.17
         28 |         95        0.95       96.12
         29 |         72        0.72       96.84
         30 |         48        0.48       97.32
         31 |         43        0.43       97.75
         32 |         27        0.27       98.02
         33 |         30        0.30       98.32
         34 |         30        0.30       98.62
         35 |         25        0.25       98.87
         36 |         10        0.10       98.97
         37 |         27        0.27       99.24
         38 |         16        0.16       99.40
         39 |         16        0.16       99.56
         40 |         11        0.11       99.67
         41 |         12        0.12       99.79
         42 |          4        0.04       99.83
         43 |          3        0.03       99.86
         44 |          3        0.03       99.89
         45 |          2        0.02       99.91
         46 |          5        0.05       99.96
         47 |          1        0.01       99.97
         53 |          1        0.01       99.98
         54 |          1        0.01       99.99
         56 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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