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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,598       45.98       45.98
          1 |         70        0.70       46.68
          2 |        100        1.00       47.68
          3 |        105        1.05       48.73
          4 |         98        0.98       49.71
          5 |        118        1.18       50.89
          6 |        134        1.34       52.23
          7 |        163        1.63       53.86
          8 |        142        1.42       55.28
          9 |        189        1.89       57.17
         10 |        152        1.52       58.69
         11 |        199        1.99       60.68
         12 |        206        2.06       62.74
         13 |        227        2.27       65.01
         14 |        239        2.39       67.40
         15 |        228        2.28       69.68
         16 |        271        2.71       72.39
         17 |        262        2.62       75.01
         18 |        256        2.56       77.57
         19 |        258        2.58       80.15
         20 |        238        2.38       82.53
         21 |        229        2.29       84.82
         22 |        228        2.28       87.10
         23 |        171        1.71       88.81
         24 |        151        1.51       90.32
         25 |        162        1.62       91.94
         26 |        131        1.31       93.25
         27 |        114        1.14       94.39
         28 |         88        0.88       95.27
         29 |         83        0.83       96.10
         30 |         72        0.72       96.82
         31 |         61        0.61       97.43
         32 |         54        0.54       97.97
         33 |         30        0.30       98.27
         34 |         40        0.40       98.67
         35 |         25        0.25       98.92
         36 |         19        0.19       99.11
         37 |         13        0.13       99.24
         38 |          6        0.06       99.30
         39 |         18        0.18       99.48
         40 |         10        0.10       99.58
         41 |          6        0.06       99.64
         42 |          5        0.05       99.69
         43 |          4        0.04       99.73
         44 |          5        0.05       99.78
         45 |          3        0.03       99.81
         46 |          3        0.03       99.84
         47 |          1        0.01       99.85
         48 |          2        0.02       99.87
         49 |          4        0.04       99.91
         50 |          1        0.01       99.92
         51 |          2        0.02       99.94
         52 |          1        0.01       99.95
         54 |          1        0.01       99.96
         55 |          1        0.01       99.97
         57 |          2        0.02       99.99
         59 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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