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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,331       43.31       43.31
          1 |         53        0.53       43.84
          2 |         83        0.83       44.67
          3 |         90        0.90       45.57
          4 |         77        0.77       46.34
          5 |        129        1.29       47.63
          6 |        134        1.34       48.97
          7 |        142        1.42       50.39
          8 |        178        1.78       52.17
          9 |        196        1.96       54.13
         10 |        196        1.96       56.09
         11 |        230        2.30       58.39
         12 |        240        2.40       60.79
         13 |        255        2.55       63.34
         14 |        227        2.27       65.61
         15 |        270        2.70       68.31
         16 |        294        2.94       71.25
         17 |        285        2.85       74.10
         18 |        282        2.82       76.92
         19 |        269        2.69       79.61
         20 |        257        2.57       82.18
         21 |        241        2.41       84.59
         22 |        239        2.39       86.98
         23 |        186        1.86       88.84
         24 |        155        1.55       90.39
         25 |        160        1.60       91.99
         26 |        131        1.31       93.30
         27 |        122        1.22       94.52
         28 |        102        1.02       95.54
         29 |         81        0.81       96.35
         30 |         64        0.64       96.99
         31 |         65        0.65       97.64
         32 |         39        0.39       98.03
         33 |         33        0.33       98.36
         34 |         23        0.23       98.59
         35 |         34        0.34       98.93
         36 |         10        0.10       99.03
         37 |         16        0.16       99.19
         38 |         18        0.18       99.37
         39 |         11        0.11       99.48
         40 |          8        0.08       99.56
         41 |          6        0.06       99.62
         42 |          7        0.07       99.69
         43 |          1        0.01       99.70
         44 |          7        0.07       99.77
         45 |          4        0.04       99.81
         46 |          3        0.03       99.84
         47 |          3        0.03       99.87
         48 |          3        0.03       99.90
         50 |          3        0.03       99.93
         51 |          2        0.02       99.95
         52 |          2        0.02       99.97
         53 |          1        0.01       99.98
         56 |          1        0.01       99.99
         58 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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