Frequencies for first 10,000 rows of rx2v1c2 variable in nhamcsopd2009 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,433       94.33       94.33
        001 |         58        0.58       94.91
        020 |          2        0.02       94.93
        040 |         96        0.96       95.89
        057 |         98        0.98       96.87
        081 |         81        0.81       97.68
        097 |         54        0.54       98.22
        105 |         45        0.45       98.67
        113 |          2        0.02       98.69
        115 |         17        0.17       98.86
        122 |         71        0.71       99.57
        133 |         25        0.25       99.82
        218 |          3        0.03       99.85
        242 |          2        0.02       99.87
        254 |          3        0.03       99.90
        358 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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