Frequencies for first 10,000 rows of rx4v1c2 variable in nhamcsed2007 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,727       97.27       97.27
        001 |         32        0.32       97.59
        040 |         22        0.22       97.81
        057 |         94        0.94       98.75
        081 |         15        0.15       98.90
        087 |          1        0.01       98.91
        097 |          5        0.05       98.96
        105 |         15        0.15       99.11
        115 |          8        0.08       99.19
        122 |         65        0.65       99.84
        133 |          6        0.06       99.90
        242 |          9        0.09       99.99
        358 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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