Frequencies for first 10,000 rows of rx2v1c3 variable in nhamcsed2011 dataset :

   For RX2, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,789       97.89       97.89
        040 |         17        0.17       98.06
        057 |        192        1.92       99.98
        097 |          1        0.01       99.99
        113 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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