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

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,824       48.24       48.24
          1 |         47        0.47       48.71
          2 |         98        0.98       49.69
          3 |         67        0.67       50.36
          4 |         97        0.97       51.33
          5 |        103        1.03       52.36
          6 |        122        1.22       53.58
          7 |        140        1.40       54.98
          8 |        136        1.36       56.34
          9 |        162        1.62       57.96
         10 |        172        1.72       59.68
         11 |        172        1.72       61.40
         12 |        229        2.29       63.69
         13 |        218        2.18       65.87
         14 |        251        2.51       68.38
         15 |        239        2.39       70.77
         16 |        252        2.52       73.29
         17 |        247        2.47       75.76
         18 |        249        2.49       78.25
         19 |        247        2.47       80.72
         20 |        223        2.23       82.95
         21 |        203        2.03       84.98
         22 |        218        2.18       87.16
         23 |        174        1.74       88.90
         24 |        179        1.79       90.69
         25 |        164        1.64       92.33
         26 |        137        1.37       93.70
         27 |         96        0.96       94.66
         28 |         84        0.84       95.50
         29 |         64        0.64       96.14
         30 |         57        0.57       96.71
         31 |         72        0.72       97.43
         32 |         46        0.46       97.89
         33 |         48        0.48       98.37
         34 |         32        0.32       98.69
         35 |         25        0.25       98.94
         36 |         17        0.17       99.11
         37 |         15        0.15       99.26
         38 |         16        0.16       99.42
         39 |         16        0.16       99.58
         40 |          5        0.05       99.63
         41 |          9        0.09       99.72
         42 |          3        0.03       99.75
         43 |          9        0.09       99.84
         44 |          2        0.02       99.86
         45 |          2        0.02       99.88
         46 |          1        0.01       99.89
         48 |          3        0.03       99.92
         49 |          1        0.01       99.93
         50 |          1        0.01       99.94
         52 |          1        0.01       99.95
         53 |          2        0.02       99.97
         55 |          1        0.01       99.98
         62 |          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