Frequencies for first 10,000 rows of a2 variable in miacc dataset :

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,504       45.04       45.04
          1 |         50        0.50       45.54
          2 |         98        0.98       46.52
          3 |        122        1.22       47.74
          4 |        114        1.14       48.88
          5 |        120        1.20       50.08
          6 |        135        1.35       51.43
          7 |        144        1.44       52.87
          8 |        146        1.46       54.33
          9 |        176        1.76       56.09
         10 |        234        2.34       58.43
         11 |        227        2.27       60.70
         12 |        227        2.27       62.97
         13 |        254        2.54       65.51
         14 |        256        2.56       68.07
         15 |        286        2.86       70.93
         16 |        247        2.47       73.40
         17 |        264        2.64       76.04
         18 |        259        2.59       78.63
         19 |        240        2.40       81.03
         20 |        220        2.20       83.23
         21 |        210        2.10       85.33
         22 |        219        2.19       87.52
         23 |        170        1.70       89.22
         24 |        174        1.74       90.96
         25 |        159        1.59       92.55
         26 |        130        1.30       93.85
         27 |        106        1.06       94.91
         28 |         93        0.93       95.84
         29 |         90        0.90       96.74
         30 |         70        0.70       97.44
         31 |         39        0.39       97.83
         32 |         39        0.39       98.22
         33 |         38        0.38       98.60
         34 |         23        0.23       98.83
         35 |         14        0.14       98.97
         36 |         14        0.14       99.11
         37 |         19        0.19       99.30
         38 |         17        0.17       99.47
         39 |         12        0.12       99.59
         40 |          7        0.07       99.66
         41 |          7        0.07       99.73
         42 |          2        0.02       99.75
         43 |          7        0.07       99.82
         44 |          4        0.04       99.86
         45 |          4        0.04       99.90
         47 |          3        0.03       99.93
         48 |          1        0.01       99.94
         49 |          1        0.01       99.95
         50 |          1        0.01       99.96
         51 |          1        0.01       99.97
         53 |          1        0.01       99.98
         57 |          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