Frequencies for first 10,000 rows of a4 variable in miacc dataset :

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,141       41.41       41.41
          1 |         49        0.49       41.90
          2 |         69        0.69       42.59
          3 |         80        0.80       43.39
          4 |         83        0.83       44.22
          5 |        101        1.01       45.23
          6 |        113        1.13       46.36
          7 |        143        1.43       47.79
          8 |        158        1.58       49.37
          9 |        184        1.84       51.21
         10 |        216        2.16       53.37
         11 |        218        2.18       55.55
         12 |        261        2.61       58.16
         13 |        249        2.49       60.65
         14 |        237        2.37       63.02
         15 |        283        2.83       65.85
         16 |        297        2.97       68.82
         17 |        292        2.92       71.74
         18 |        262        2.62       74.36
         19 |        263        2.63       76.99
         20 |        275        2.75       79.74
         21 |        251        2.51       82.25
         22 |        242        2.42       84.67
         23 |        236        2.36       87.03
         24 |        201        2.01       89.04
         25 |        182        1.82       90.86
         26 |        132        1.32       92.18
         27 |        123        1.23       93.41
         28 |         99        0.99       94.40
         29 |         89        0.89       95.29
         30 |         82        0.82       96.11
         31 |         68        0.68       96.79
         32 |         59        0.59       97.38
         33 |         46        0.46       97.84
         34 |         35        0.35       98.19
         35 |         37        0.37       98.56
         36 |         33        0.33       98.89
         37 |         18        0.18       99.07
         38 |         14        0.14       99.21
         39 |         16        0.16       99.37
         40 |         11        0.11       99.48
         41 |         10        0.10       99.58
         42 |          7        0.07       99.65
         43 |          4        0.04       99.69
         44 |          6        0.06       99.75
         45 |          2        0.02       99.77
         46 |          3        0.03       99.80
         47 |          1        0.01       99.81
         48 |          2        0.02       99.83
         49 |          2        0.02       99.85
         50 |          1        0.01       99.86
         51 |          1        0.01       99.87
         53 |          1        0.01       99.88
         54 |          1        0.01       99.89
         56 |          1        0.01       99.90
         59 |          1        0.01       99.91
         61 |          1        0.01       99.92
         62 |          1        0.01       99.93
         63 |          2        0.02       99.95
         66 |          1        0.01       99.96
         69 |          1        0.01       99.97
         71 |          1        0.01       99.98
         74 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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