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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,008       60.08       60.08
          1 |         62        0.62       60.70
          2 |         81        0.81       61.51
          3 |         59        0.59       62.10
          4 |         67        0.67       62.77
          5 |         75        0.75       63.52
          6 |         78        0.78       64.30
          7 |         92        0.92       65.22
          8 |         93        0.93       66.15
          9 |        102        1.02       67.17
         10 |        117        1.17       68.34
         11 |        157        1.57       69.91
         12 |        143        1.43       71.34
         13 |        156        1.56       72.90
         14 |        179        1.79       74.69
         15 |        193        1.93       76.62
         16 |        181        1.81       78.43
         17 |        176        1.76       80.19
         18 |        192        1.92       82.11
         19 |        194        1.94       84.05
         20 |        192        1.92       85.97
         21 |        177        1.77       87.74
         22 |        168        1.68       89.42
         23 |        143        1.43       90.85
         24 |        140        1.40       92.25
         25 |        133        1.33       93.58
         26 |        112        1.12       94.70
         27 |         84        0.84       95.54
         28 |         78        0.78       96.32
         29 |         52        0.52       96.84
         30 |         65        0.65       97.49
         31 |         46        0.46       97.95
         32 |         35        0.35       98.30
         33 |         33        0.33       98.63
         34 |         19        0.19       98.82
         35 |         28        0.28       99.10
         36 |         22        0.22       99.32
         37 |         15        0.15       99.47
         38 |          7        0.07       99.54
         39 |          6        0.06       99.60
         40 |          8        0.08       99.68
         41 |          2        0.02       99.70
         42 |          5        0.05       99.75
         43 |          3        0.03       99.78
         44 |          8        0.08       99.86
         46 |          2        0.02       99.88
         47 |          1        0.01       99.89
         48 |          3        0.03       99.92
         49 |          1        0.01       99.93
         50 |          1        0.01       99.94
         59 |          1        0.01       99.95
         67 |          1        0.01       99.96
         68 |          1        0.01       99.97
         79 |          1        0.01       99.98
         94 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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