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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,531       55.31       55.31
          1 |         49        0.49       55.80
          2 |         82        0.82       56.62
          3 |         78        0.78       57.40
          4 |         83        0.83       58.23
          5 |         81        0.81       59.04
          6 |         98        0.98       60.02
          7 |         94        0.94       60.96
          8 |        137        1.37       62.33
          9 |        136        1.36       63.69
         10 |        169        1.69       65.38
         11 |        171        1.71       67.09
         12 |        185        1.85       68.94
         13 |        220        2.20       71.14
         14 |        187        1.87       73.01
         15 |        198        1.98       74.99
         16 |        218        2.18       77.17
         17 |        195        1.95       79.12
         18 |        189        1.89       81.01
         19 |        203        2.03       83.04
         20 |        199        1.99       85.03
         21 |        150        1.50       86.53
         22 |        173        1.73       88.26
         23 |        138        1.38       89.64
         24 |        140        1.40       91.04
         25 |        129        1.29       92.33
         26 |         90        0.90       93.23
         27 |        111        1.11       94.34
         28 |         78        0.78       95.12
         29 |         87        0.87       95.99
         30 |         70        0.70       96.69
         31 |         40        0.40       97.09
         32 |         58        0.58       97.67
         33 |         46        0.46       98.13
         34 |         37        0.37       98.50
         35 |         29        0.29       98.79
         36 |         24        0.24       99.03
         37 |         16        0.16       99.19
         38 |         12        0.12       99.31
         39 |          9        0.09       99.40
         40 |         14        0.14       99.54
         41 |         13        0.13       99.67
         42 |          5        0.05       99.72
         43 |          5        0.05       99.77
         44 |          6        0.06       99.83
         45 |          5        0.05       99.88
         46 |          2        0.02       99.90
         47 |          2        0.02       99.92
         50 |          2        0.02       99.94
         56 |          2        0.02       99.96
         60 |          1        0.01       99.97
         67 |          1        0.01       99.98
         72 |          1        0.01       99.99
         85 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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