Frequencies for first 10,000 rows of a2 variable in miacc83 dataset :

         a2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,152       41.52       41.52
          1 |         50        0.50       42.02
          2 |         75        0.75       42.77
          3 |         82        0.82       43.59
          4 |         87        0.87       44.46
          5 |         89        0.89       45.35
          6 |        125        1.25       46.60
          7 |        154        1.54       48.14
          8 |        166        1.66       49.80
          9 |        181        1.81       51.61
         10 |        222        2.22       53.83
         11 |        223        2.23       56.06
         12 |        229        2.29       58.35
         13 |        253        2.53       60.88
         14 |        275        2.75       63.63
         15 |        266        2.66       66.29
         16 |        293        2.93       69.22
         17 |        288        2.88       72.10
         18 |        279        2.79       74.89
         19 |        284        2.84       77.73
         20 |        260        2.60       80.33
         21 |        234        2.34       82.67
         22 |        241        2.41       85.08
         23 |        206        2.06       87.14
         24 |        186        1.86       89.00
         25 |        161        1.61       90.61
         26 |        164        1.64       92.25
         27 |        138        1.38       93.63
         28 |        102        1.02       94.65
         29 |         87        0.87       95.52
         30 |         78        0.78       96.30
         31 |         73        0.73       97.03
         32 |         52        0.52       97.55
         33 |         45        0.45       98.00
         34 |         29        0.29       98.29
         35 |         36        0.36       98.65
         36 |         29        0.29       98.94
         37 |         21        0.21       99.15
         38 |         18        0.18       99.33
         39 |         12        0.12       99.45
         40 |          8        0.08       99.53
         41 |         11        0.11       99.64
         42 |          7        0.07       99.71
         43 |          2        0.02       99.73
         44 |          5        0.05       99.78
         45 |          2        0.02       99.80
         46 |          4        0.04       99.84
         47 |          3        0.03       99.87
         48 |          5        0.05       99.92
         49 |          2        0.02       99.94
         51 |          2        0.02       99.96
         53 |          1        0.01       99.97
         55 |          1        0.01       99.98
         59 |          1        0.01       99.99
         64 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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