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

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,974       59.74       59.74
          1 |         48        0.48       60.22
          2 |         83        0.83       61.05
          3 |         89        0.89       61.94
          4 |        103        1.03       62.97
          5 |         77        0.77       63.74
          6 |         87        0.87       64.61
          7 |         91        0.91       65.52
          8 |        107        1.07       66.59
          9 |        122        1.22       67.81
         10 |        132        1.32       69.13
         11 |        127        1.27       70.40
         12 |        151        1.51       71.91
         13 |        157        1.57       73.48
         14 |        170        1.70       75.18
         15 |        190        1.90       77.08
         16 |        164        1.64       78.72
         17 |        186        1.86       80.58
         18 |        191        1.91       82.49
         19 |        167        1.67       84.16
         20 |        163        1.63       85.79
         21 |        154        1.54       87.33
         22 |        156        1.56       88.89
         23 |        143        1.43       90.32
         24 |        141        1.41       91.73
         25 |        116        1.16       92.89
         26 |        120        1.20       94.09
         27 |        104        1.04       95.13
         28 |         76        0.76       95.89
         29 |         52        0.52       96.41
         30 |         44        0.44       96.85
         31 |         38        0.38       97.23
         32 |         48        0.48       97.71
         33 |         38        0.38       98.09
         34 |         31        0.31       98.40
         35 |         27        0.27       98.67
         36 |         23        0.23       98.90
         37 |         26        0.26       99.16
         38 |         16        0.16       99.32
         39 |         10        0.10       99.42
         40 |         15        0.15       99.57
         41 |          9        0.09       99.66
         42 |          5        0.05       99.71
         43 |          7        0.07       99.78
         44 |          5        0.05       99.83
         45 |          1        0.01       99.84
         46 |          3        0.03       99.87
         47 |          1        0.01       99.88
         48 |          2        0.02       99.90
         49 |          1        0.01       99.91
         50 |          1        0.01       99.92
         55 |          1        0.01       99.93
         61 |          1        0.01       99.94
         63 |          1        0.01       99.95
         64 |          2        0.02       99.97
         66 |          1        0.01       99.98
         73 |          1        0.01       99.99
         76 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016