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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,626       46.26       46.26
          1 |         72        0.72       46.98
          2 |         98        0.98       47.96
          3 |        101        1.01       48.97
          4 |         90        0.90       49.87
          5 |        133        1.33       51.20
          6 |        124        1.24       52.44
          7 |        131        1.31       53.75
          8 |        173        1.73       55.48
          9 |        164        1.64       57.12
         10 |        175        1.75       58.87
         11 |        217        2.17       61.04
         12 |        225        2.25       63.29
         13 |        229        2.29       65.58
         14 |        217        2.17       67.75
         15 |        263        2.63       70.38
         16 |        282        2.82       73.20
         17 |        258        2.58       75.78
         18 |        266        2.66       78.44
         19 |        231        2.31       80.75
         20 |        224        2.24       82.99
         21 |        231        2.31       85.30
         22 |        196        1.96       87.26
         23 |        183        1.83       89.09
         24 |        156        1.56       90.65
         25 |        142        1.42       92.07
         26 |        130        1.30       93.37
         27 |        112        1.12       94.49
         28 |         97        0.97       95.46
         29 |         72        0.72       96.18
         30 |         74        0.74       96.92
         31 |         65        0.65       97.57
         32 |         45        0.45       98.02
         33 |         41        0.41       98.43
         34 |         39        0.39       98.82
         35 |         26        0.26       99.08
         36 |         17        0.17       99.25
         37 |         16        0.16       99.41
         38 |         15        0.15       99.56
         39 |          9        0.09       99.65
         40 |          9        0.09       99.74
         41 |          6        0.06       99.80
         42 |          4        0.04       99.84
         43 |          6        0.06       99.90
         44 |          1        0.01       99.91
         45 |          2        0.02       99.93
         47 |          1        0.01       99.94
         49 |          2        0.02       99.96
         50 |          2        0.02       99.98
         59 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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