Frequencies for first 10,000 rows of rx2v1c1 variable in nhamcsopd2009 dataset :

   for rx2, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,113       51.13       51.13
        001 |        277        2.77       53.90
        020 |         80        0.80       54.70
        028 |         12        0.12       54.82
        040 |        661        6.61       61.43
        057 |      1,111       11.11       72.54
        081 |         53        0.53       73.07
        087 |        255        2.55       75.62
        097 |        223        2.23       77.85
        105 |        117        1.17       79.02
        113 |         29        0.29       79.31
        115 |        407        4.07       83.38
        122 |        322        3.22       86.60
        133 |        255        2.55       89.15
        218 |         39        0.39       89.54
        242 |        362        3.62       93.16
        254 |        228        2.28       95.44
        331 |          2        0.02       95.46
        358 |        448        4.48       99.94
        365 |          2        0.02       99.96
        899 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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