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

         a9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,765       47.65       47.65
          1 |         50        0.50       48.15
          2 |         98        0.98       49.13
          3 |         56        0.56       49.69
          4 |        106        1.06       50.75
          5 |        107        1.07       51.82
          6 |        115        1.15       52.97
          7 |        145        1.45       54.42
          8 |        150        1.50       55.92
          9 |        157        1.57       57.49
         10 |        170        1.70       59.19
         11 |        176        1.76       60.95
         12 |        217        2.17       63.12
         13 |        221        2.21       65.33
         14 |        257        2.57       67.90
         15 |        257        2.57       70.47
         16 |        267        2.67       73.14
         17 |        244        2.44       75.58
         18 |        249        2.49       78.07
         19 |        242        2.42       80.49
         20 |        222        2.22       82.71
         21 |        229        2.29       85.00
         22 |        229        2.29       87.29
         23 |        181        1.81       89.10
         24 |        196        1.96       91.06
         25 |        168        1.68       92.74
         26 |        146        1.46       94.20
         27 |         96        0.96       95.16
         28 |         74        0.74       95.90
         29 |         61        0.61       96.51
         30 |         57        0.57       97.08
         31 |         65        0.65       97.73
         32 |         46        0.46       98.19
         33 |         32        0.32       98.51
         34 |         35        0.35       98.86
         35 |         23        0.23       99.09
         36 |         12        0.12       99.21
         37 |         13        0.13       99.34
         38 |         18        0.18       99.52
         39 |         10        0.10       99.62
         40 |          7        0.07       99.69
         41 |          9        0.09       99.78
         42 |          4        0.04       99.82
         43 |          6        0.06       99.88
         44 |          1        0.01       99.89
         45 |          1        0.01       99.90
         47 |          1        0.01       99.91
         48 |          2        0.02       99.93
         49 |          1        0.01       99.94
         50 |          2        0.02       99.96
         53 |          2        0.02       99.98
         62 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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