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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,887       48.87       48.87
          1 |         61        0.61       49.48
          2 |        103        1.03       50.51
          3 |         99        0.99       51.50
          4 |         90        0.90       52.40
          5 |        106        1.06       53.46
          6 |        119        1.19       54.65
          7 |        122        1.22       55.87
          8 |        138        1.38       57.25
          9 |        162        1.62       58.87
         10 |        188        1.88       60.75
         11 |        196        1.96       62.71
         12 |        204        2.04       64.75
         13 |        205        2.05       66.80
         14 |        226        2.26       69.06
         15 |        228        2.28       71.34
         16 |        252        2.52       73.86
         17 |        273        2.73       76.59
         18 |        219        2.19       78.78
         19 |        225        2.25       81.03
         20 |        239        2.39       83.42
         21 |        223        2.23       85.65
         22 |        214        2.14       87.79
         23 |        178        1.78       89.57
         24 |        159        1.59       91.16
         25 |        143        1.43       92.59
         26 |        120        1.20       93.79
         27 |        125        1.25       95.04
         28 |         92        0.92       95.96
         29 |         77        0.77       96.73
         30 |         74        0.74       97.47
         31 |         43        0.43       97.90
         32 |         33        0.33       98.23
         33 |         30        0.30       98.53
         34 |         24        0.24       98.77
         35 |         22        0.22       98.99
         36 |         22        0.22       99.21
         37 |         16        0.16       99.37
         38 |         17        0.17       99.54
         39 |         10        0.10       99.64
         40 |          8        0.08       99.72
         41 |          2        0.02       99.74
         42 |          2        0.02       99.76
         43 |          5        0.05       99.81
         44 |          3        0.03       99.84
         45 |          2        0.02       99.86
         46 |          3        0.03       99.89
         47 |          3        0.03       99.92
         48 |          3        0.03       99.95
         51 |          1        0.01       99.96
         52 |          1        0.01       99.97
         53 |          1        0.01       99.98
         56 |          1        0.01       99.99
         66 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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