Frequencies for first 10,000 rows of rx1v2c3 variable in namcs2007 dataset :

   for rx1, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,930       99.30       99.30
        064 |         21        0.21       99.51
        065 |         32        0.32       99.83
        101 |         13        0.13       99.96
        270 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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