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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,771       57.71       57.71
          1 |         52        0.52       58.23
          2 |         88        0.88       59.11
          3 |         80        0.80       59.91
          4 |         81        0.81       60.72
          5 |         82        0.82       61.54
          6 |        104        1.04       62.58
          7 |         94        0.94       63.52
          8 |        122        1.22       64.74
          9 |        125        1.25       65.99
         10 |        136        1.36       67.35
         11 |        155        1.55       68.90
         12 |        175        1.75       70.65
         13 |        171        1.71       72.36
         14 |        175        1.75       74.11
         15 |        185        1.85       75.96
         16 |        173        1.73       77.69
         17 |        198        1.98       79.67
         18 |        203        2.03       81.70
         19 |        173        1.73       83.43
         20 |        191        1.91       85.34
         21 |        203        2.03       87.37
         22 |        163        1.63       89.00
         23 |        143        1.43       90.43
         24 |        128        1.28       91.71
         25 |        117        1.17       92.88
         26 |         95        0.95       93.83
         27 |        107        1.07       94.90
         28 |         84        0.84       95.74
         29 |         80        0.80       96.54
         30 |         57        0.57       97.11
         31 |         38        0.38       97.49
         32 |         34        0.34       97.83
         33 |         32        0.32       98.15
         34 |         39        0.39       98.54
         35 |         26        0.26       98.80
         36 |         27        0.27       99.07
         37 |         15        0.15       99.22
         38 |         15        0.15       99.37
         39 |          9        0.09       99.46
         40 |         12        0.12       99.58
         41 |          9        0.09       99.67
         42 |          7        0.07       99.74
         43 |          6        0.06       99.80
         44 |          3        0.03       99.83
         45 |          5        0.05       99.88
         46 |          2        0.02       99.90
         48 |          2        0.02       99.92
         49 |          2        0.02       99.94
         50 |          2        0.02       99.96
         52 |          1        0.01       99.97
         55 |          1        0.01       99.98
         63 |          1        0.01       99.99
         79 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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