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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,860       58.60       58.60
          1 |         67        0.67       59.27
          2 |        102        1.02       60.29
          3 |         87        0.87       61.16
          4 |         72        0.72       61.88
          5 |         89        0.89       62.77
          6 |         85        0.85       63.62
          7 |         92        0.92       64.54
          8 |        107        1.07       65.61
          9 |        155        1.55       67.16
         10 |        155        1.55       68.71
         11 |        156        1.56       70.27
         12 |        178        1.78       72.05
         13 |        155        1.55       73.60
         14 |        184        1.84       75.44
         15 |        175        1.75       77.19
         16 |        191        1.91       79.10
         17 |        206        2.06       81.16
         18 |        182        1.82       82.98
         19 |        169        1.69       84.67
         20 |        201        2.01       86.68
         21 |        144        1.44       88.12
         22 |        173        1.73       89.85
         23 |        142        1.42       91.27
         24 |        129        1.29       92.56
         25 |        120        1.20       93.76
         26 |         97        0.97       94.73
         27 |         92        0.92       95.65
         28 |         75        0.75       96.40
         29 |         63        0.63       97.03
         30 |         51        0.51       97.54
         31 |         31        0.31       97.85
         32 |         41        0.41       98.26
         33 |         31        0.31       98.57
         34 |         15        0.15       98.72
         35 |         27        0.27       98.99
         36 |         22        0.22       99.21
         37 |         15        0.15       99.36
         38 |         11        0.11       99.47
         39 |         11        0.11       99.58
         40 |          7        0.07       99.65
         41 |          9        0.09       99.74
         42 |          3        0.03       99.77
         43 |          1        0.01       99.78
         44 |          3        0.03       99.81
         45 |          5        0.05       99.86
         46 |          3        0.03       99.89
         47 |          3        0.03       99.92
         48 |          1        0.01       99.93
         49 |          1        0.01       99.94
         50 |          1        0.01       99.95
         52 |          1        0.01       99.96
         53 |          1        0.01       99.97
         55 |          2        0.02       99.99
         61 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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