Frequencies for first 10,000 rows of a9 variable in miacc dataset :

         a9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,536       45.36       45.36
          1 |         52        0.52       45.88
          2 |         99        0.99       46.87
          3 |        108        1.08       47.95
          4 |        118        1.18       49.13
          5 |        124        1.24       50.37
          6 |        140        1.40       51.77
          7 |        151        1.51       53.28
          8 |        161        1.61       54.89
          9 |        175        1.75       56.64
         10 |        237        2.37       59.01
         11 |        220        2.20       61.21
         12 |        218        2.18       63.39
         13 |        264        2.64       66.03
         14 |        262        2.62       68.65
         15 |        274        2.74       71.39
         16 |        255        2.55       73.94
         17 |        249        2.49       76.43
         18 |        257        2.57       79.00
         19 |        229        2.29       81.29
         20 |        207        2.07       83.36
         21 |        223        2.23       85.59
         22 |        207        2.07       87.66
         23 |        179        1.79       89.45
         24 |        168        1.68       91.13
         25 |        132        1.32       92.45
         26 |        130        1.30       93.75
         27 |        116        1.16       94.91
         28 |         93        0.93       95.84
         29 |         78        0.78       96.62
         30 |         71        0.71       97.33
         31 |         48        0.48       97.81
         32 |         39        0.39       98.20
         33 |         34        0.34       98.54
         34 |         26        0.26       98.80
         35 |         15        0.15       98.95
         36 |         18        0.18       99.13
         37 |         16        0.16       99.29
         38 |         17        0.17       99.46
         39 |         10        0.10       99.56
         40 |          7        0.07       99.63
         41 |         10        0.10       99.73
         42 |          4        0.04       99.77
         43 |          5        0.05       99.82
         44 |          5        0.05       99.87
         45 |          2        0.02       99.89
         46 |          1        0.01       99.90
         47 |          2        0.02       99.92
         48 |          2        0.02       99.94
         49 |          1        0.01       99.95
         51 |          1        0.01       99.96
         55 |          1        0.01       99.97
         57 |          1        0.01       99.98
         62 |          1        0.01       99.99
         63 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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