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

         a1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,507       45.07       45.07
          1 |         53        0.53       45.60
          2 |         97        0.97       46.57
          3 |        120        1.20       47.77
          4 |        115        1.15       48.92
          5 |        116        1.16       50.08
          6 |        133        1.33       51.41
          7 |        147        1.47       52.88
          8 |        149        1.49       54.37
          9 |        210        2.10       56.47
         10 |        214        2.14       58.61
         11 |        227        2.27       60.88
         12 |        212        2.12       63.00
         13 |        249        2.49       65.49
         14 |        263        2.63       68.12
         15 |        270        2.70       70.82
         16 |        258        2.58       73.40
         17 |        266        2.66       76.06
         18 |        284        2.84       78.90
         19 |        227        2.27       81.17
         20 |        228        2.28       83.45
         21 |        204        2.04       85.49
         22 |        215        2.15       87.64
         23 |        179        1.79       89.43
         24 |        165        1.65       91.08
         25 |        137        1.37       92.45
         26 |        124        1.24       93.69
         27 |        106        1.06       94.75
         28 |         93        0.93       95.68
         29 |         85        0.85       96.53
         30 |         70        0.70       97.23
         31 |         42        0.42       97.65
         32 |         45        0.45       98.10
         33 |         47        0.47       98.57
         34 |         29        0.29       98.86
         35 |         13        0.13       98.99
         36 |         17        0.17       99.16
         37 |         13        0.13       99.29
         38 |         16        0.16       99.45
         39 |          9        0.09       99.54
         40 |          9        0.09       99.63
         41 |          5        0.05       99.68
         42 |          2        0.02       99.70
         43 |          8        0.08       99.78
         44 |          4        0.04       99.82
         45 |          2        0.02       99.84
         46 |          3        0.03       99.87
         47 |          3        0.03       99.90
         48 |          2        0.02       99.92
         49 |          2        0.02       99.94
         50 |          1        0.01       99.95
         51 |          2        0.02       99.97
         57 |          1        0.01       99.98
         59 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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