Frequencies for first 10,000 rows of rx1v1c2 variable in namcs2009 dataset :

   for rx1, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,226       92.26       92.26
        001 |        150        1.50       93.76
        040 |        110        1.10       94.86
        057 |        103        1.03       95.89
        081 |        126        1.26       97.15
        087 |          2        0.02       97.17
        097 |         55        0.55       97.72
        105 |         47        0.47       98.19
        115 |         15        0.15       98.34
        122 |         87        0.87       99.21
        133 |         21        0.21       99.42
        218 |          2        0.02       99.44
        242 |          6        0.06       99.50
        254 |          4        0.04       99.54
        331 |          1        0.01       99.55
        358 |         45        0.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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