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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,108       41.08       41.08
          1 |         51        0.51       41.59
          2 |         74        0.74       42.33
          3 |         82        0.82       43.15
          4 |        103        1.03       44.18
          5 |         99        0.99       45.17
          6 |        120        1.20       46.37
          7 |        129        1.29       47.66
          8 |        153        1.53       49.19
          9 |        166        1.66       50.85
         10 |        224        2.24       53.09
         11 |        223        2.23       55.32
         12 |        253        2.53       57.85
         13 |        251        2.51       60.36
         14 |        247        2.47       62.83
         15 |        272        2.72       65.55
         16 |        277        2.77       68.32
         17 |        310        3.10       71.42
         18 |        284        2.84       74.26
         19 |        272        2.72       76.98
         20 |        290        2.90       79.88
         21 |        269        2.69       82.57
         22 |        242        2.42       84.99
         23 |        218        2.18       87.17
         24 |        184        1.84       89.01
         25 |        168        1.68       90.69
         26 |        141        1.41       92.10
         27 |        139        1.39       93.49
         28 |        112        1.12       94.61
         29 |         90        0.90       95.51
         30 |         85        0.85       96.36
         31 |         64        0.64       97.00
         32 |         56        0.56       97.56
         33 |         48        0.48       98.04
         34 |         33        0.33       98.37
         35 |         26        0.26       98.63
         36 |         32        0.32       98.95
         37 |         17        0.17       99.12
         38 |         18        0.18       99.30
         39 |         10        0.10       99.40
         40 |          9        0.09       99.49
         41 |         13        0.13       99.62
         42 |          6        0.06       99.68
         43 |          4        0.04       99.72
         44 |          6        0.06       99.78
         45 |          2        0.02       99.80
         46 |          3        0.03       99.83
         47 |          3        0.03       99.86
         48 |          3        0.03       99.89
         49 |          1        0.01       99.90
         50 |          1        0.01       99.91
         59 |          1        0.01       99.92
         61 |          1        0.01       99.93
         62 |          1        0.01       99.94
         63 |          2        0.02       99.96
         66 |          1        0.01       99.97
         69 |          1        0.01       99.98
         74 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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