Frequencies for first 10,000 rows of rx1v1c2 variable in nhamcsopd2010 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,117       91.17       91.17
        001 |        105        1.05       92.22
        020 |          8        0.08       92.30
        040 |        182        1.82       94.12
        057 |        105        1.05       95.17
        081 |        127        1.27       96.44
        087 |          2        0.02       96.46
        097 |         88        0.88       97.34
        105 |         62        0.62       97.96
        113 |          4        0.04       98.00
        115 |         12        0.12       98.12
        122 |         99        0.99       99.11
        133 |         37        0.37       99.48
        218 |         12        0.12       99.60
        242 |          9        0.09       99.69
        254 |         12        0.12       99.81
        358 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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