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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,108       61.08       61.08
          1 |         44        0.44       61.52
          2 |         83        0.83       62.35
          3 |         90        0.90       63.25
          4 |         78        0.78       64.03
          5 |         88        0.88       64.91
          6 |        107        1.07       65.98
          7 |        100        1.00       66.98
          8 |        128        1.28       68.26
          9 |        129        1.29       69.55
         10 |        125        1.25       70.80
         11 |        138        1.38       72.18
         12 |        171        1.71       73.89
         13 |        133        1.33       75.22
         14 |        171        1.71       76.93
         15 |        181        1.81       78.74
         16 |        169        1.69       80.43
         17 |        175        1.75       82.18
         18 |        213        2.13       84.31
         19 |        159        1.59       85.90
         20 |        153        1.53       87.43
         21 |        153        1.53       88.96
         22 |        144        1.44       90.40
         23 |        129        1.29       91.69
         24 |        124        1.24       92.93
         25 |        109        1.09       94.02
         26 |         82        0.82       94.84
         27 |         94        0.94       95.78
         28 |         72        0.72       96.50
         29 |         55        0.55       97.05
         30 |         39        0.39       97.44
         31 |         45        0.45       97.89
         32 |         40        0.40       98.29
         33 |         19        0.19       98.48
         34 |         26        0.26       98.74
         35 |         14        0.14       98.88
         36 |         16        0.16       99.04
         37 |         17        0.17       99.21
         38 |         15        0.15       99.36
         39 |          9        0.09       99.45
         40 |         11        0.11       99.56
         41 |          6        0.06       99.62
         42 |          3        0.03       99.65
         43 |          3        0.03       99.68
         44 |          2        0.02       99.70
         45 |          3        0.03       99.73
         46 |          4        0.04       99.77
         47 |          6        0.06       99.83
         48 |          4        0.04       99.87
         49 |          3        0.03       99.90
         50 |          2        0.02       99.92
         51 |          1        0.01       99.93
         53 |          1        0.01       99.94
         55 |          1        0.01       99.95
         58 |          1        0.01       99.96
         59 |          1        0.01       99.97
         60 |          1        0.01       99.98
         63 |          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