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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,068       60.68       60.68
          1 |         60        0.60       61.28
          2 |         81        0.81       62.09
          3 |         68        0.68       62.77
          4 |         75        0.75       63.52
          5 |         97        0.97       64.49
          6 |         87        0.87       65.36
          7 |         99        0.99       66.35
          8 |        121        1.21       67.56
          9 |        133        1.33       68.89
         10 |        125        1.25       70.14
         11 |        168        1.68       71.82
         12 |        173        1.73       73.55
         13 |        147        1.47       75.02
         14 |        169        1.69       76.71
         15 |        168        1.68       78.39
         16 |        152        1.52       79.91
         17 |        184        1.84       81.75
         18 |        197        1.97       83.72
         19 |        190        1.90       85.62
         20 |        166        1.66       87.28
         21 |        156        1.56       88.84
         22 |        144        1.44       90.28
         23 |        139        1.39       91.67
         24 |        103        1.03       92.70
         25 |         98        0.98       93.68
         26 |        100        1.00       94.68
         27 |         87        0.87       95.55
         28 |         75        0.75       96.30
         29 |         63        0.63       96.93
         30 |         50        0.50       97.43
         31 |         40        0.40       97.83
         32 |         44        0.44       98.27
         33 |         46        0.46       98.73
         34 |         25        0.25       98.98
         35 |         29        0.29       99.27
         36 |         15        0.15       99.42
         37 |          9        0.09       99.51
         38 |         11        0.11       99.62
         39 |          9        0.09       99.71
         40 |          6        0.06       99.77
         41 |          5        0.05       99.82
         42 |          3        0.03       99.85
         43 |          1        0.01       99.86
         44 |          3        0.03       99.89
         45 |          3        0.03       99.92
         46 |          3        0.03       99.95
         47 |          1        0.01       99.96
         49 |          1        0.01       99.97
         51 |          1        0.01       99.98
         53 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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