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

         a4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,811       48.11       48.11
          1 |         44        0.44       48.55
          2 |         99        0.99       49.54
          3 |         73        0.73       50.27
          4 |         97        0.97       51.24
          5 |        106        1.06       52.30
          6 |        123        1.23       53.53
          7 |        137        1.37       54.90
          8 |        147        1.47       56.37
          9 |        154        1.54       57.91
         10 |        159        1.59       59.50
         11 |        179        1.79       61.29
         12 |        238        2.38       63.67
         13 |        220        2.20       65.87
         14 |        248        2.48       68.35
         15 |        244        2.44       70.79
         16 |        246        2.46       73.25
         17 |        236        2.36       75.61
         18 |        249        2.49       78.10
         19 |        253        2.53       80.63
         20 |        221        2.21       82.84
         21 |        217        2.17       85.01
         22 |        225        2.25       87.26
         23 |        176        1.76       89.02
         24 |        196        1.96       90.98
         25 |        158        1.58       92.56
         26 |        142        1.42       93.98
         27 |         98        0.98       94.96
         28 |         80        0.80       95.76
         29 |         64        0.64       96.40
         30 |         62        0.62       97.02
         31 |         66        0.66       97.68
         32 |         46        0.46       98.14
         33 |         38        0.38       98.52
         34 |         29        0.29       98.81
         35 |         20        0.20       99.01
         36 |         14        0.14       99.15
         37 |         15        0.15       99.30
         38 |         18        0.18       99.48
         39 |         12        0.12       99.60
         40 |          7        0.07       99.67
         41 |          6        0.06       99.73
         42 |          5        0.05       99.78
         43 |          6        0.06       99.84
         44 |          1        0.01       99.85
         45 |          2        0.02       99.87
         46 |          1        0.01       99.88
         48 |          4        0.04       99.92
         49 |          1        0.01       99.93
         50 |          2        0.02       99.95
         53 |          2        0.02       99.97
         58 |          1        0.01       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