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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,003       60.03       60.03
          1 |         47        0.47       60.50
          2 |         87        0.87       61.37
          3 |         78        0.78       62.15
          4 |         79        0.79       62.94
          5 |         90        0.90       63.84
          6 |         98        0.98       64.82
          7 |         94        0.94       65.76
          8 |        133        1.33       67.09
          9 |        106        1.06       68.15
         10 |        158        1.58       69.73
         11 |        128        1.28       71.01
         12 |        140        1.40       72.41
         13 |        145        1.45       73.86
         14 |        193        1.93       75.79
         15 |        174        1.74       77.53
         16 |        204        2.04       79.57
         17 |        194        1.94       81.51
         18 |        155        1.55       83.06
         19 |        191        1.91       84.97
         20 |        175        1.75       86.72
         21 |        153        1.53       88.25
         22 |        148        1.48       89.73
         23 |        148        1.48       91.21
         24 |        119        1.19       92.40
         25 |        143        1.43       93.83
         26 |        112        1.12       94.95
         27 |         73        0.73       95.68
         28 |         79        0.79       96.47
         29 |         58        0.58       97.05
         30 |         39        0.39       97.44
         31 |         57        0.57       98.01
         32 |         41        0.41       98.42
         33 |         34        0.34       98.76
         34 |         23        0.23       98.99
         35 |         18        0.18       99.17
         36 |          7        0.07       99.24
         37 |         10        0.10       99.34
         38 |         13        0.13       99.47
         39 |         12        0.12       99.59
         40 |         11        0.11       99.70
         41 |          3        0.03       99.73
         42 |          7        0.07       99.80
         43 |          3        0.03       99.83
         44 |          4        0.04       99.87
         45 |          2        0.02       99.89
         46 |          2        0.02       99.91
         48 |          1        0.01       99.92
         49 |          1        0.01       99.93
         50 |          1        0.01       99.94
         51 |          1        0.01       99.95
         57 |          3        0.03       99.98
         67 |          1        0.01       99.99
         77 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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