Frequencies for first 10,000 rows of a1 variable in miacc dataset :

         a1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,916       59.16       59.16
          1 |         63        0.63       59.79
          2 |         83        0.83       60.62
          3 |         70        0.70       61.32
          4 |        103        1.03       62.35
          5 |         91        0.91       63.26
          6 |         93        0.93       64.19
          7 |        104        1.04       65.23
          8 |        128        1.28       66.51
          9 |        130        1.30       67.81
         10 |        155        1.55       69.36
         11 |        156        1.56       70.92
         12 |        146        1.46       72.38
         13 |        156        1.56       73.94
         14 |        155        1.55       75.49
         15 |        151        1.51       77.00
         16 |        198        1.98       78.98
         17 |        187        1.87       80.85
         18 |        186        1.86       82.71
         19 |        164        1.64       84.35
         20 |        195        1.95       86.30
         21 |        194        1.94       88.24
         22 |        151        1.51       89.75
         23 |        144        1.44       91.19
         24 |        133        1.33       92.52
         25 |        124        1.24       93.76
         26 |         98        0.98       94.74
         27 |        106        1.06       95.80
         28 |         74        0.74       96.54
         29 |         61        0.61       97.15
         30 |         51        0.51       97.66
         31 |         39        0.39       98.05
         32 |         32        0.32       98.37
         33 |         21        0.21       98.58
         34 |         20        0.20       98.78
         35 |         25        0.25       99.03
         36 |          8        0.08       99.11
         37 |         15        0.15       99.26
         38 |          7        0.07       99.33
         39 |          7        0.07       99.40
         40 |         13        0.13       99.53
         41 |          8        0.08       99.61
         42 |          8        0.08       99.69
         43 |          5        0.05       99.74
         44 |          4        0.04       99.78
         45 |          2        0.02       99.80
         46 |          4        0.04       99.84
         47 |          3        0.03       99.87
         48 |          3        0.03       99.90
         49 |          1        0.01       99.91
         50 |          2        0.02       99.93
         54 |          2        0.02       99.95
         57 |          1        0.01       99.96
         60 |          3        0.03       99.99
         72 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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