Frequencies for first 10,000 rows of rx2v3c2 variable in nhamcsed2009 dataset :

   for rx2, |
 level 3 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,443       94.43       94.43
        180 |         22        0.22       94.65
        196 |        145        1.45       96.10
        198 |        111        1.11       97.21
        201 |          1        0.01       97.22
        203 |         51        0.51       97.73
        210 |         16        0.16       97.89
        211 |         65        0.65       98.54
        239 |         23        0.23       98.77
        268 |         16        0.16       98.93
        276 |          1        0.01       98.94
        292 |          4        0.04       98.98
        301 |          3        0.03       99.01
        351 |          1        0.01       99.02
        385 |         71        0.71       99.73
        386 |          3        0.03       99.76
        387 |          1        0.01       99.77
        388 |         13        0.13       99.90
        389 |          4        0.04       99.94
        395 |          1        0.01       99.95
        407 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016