Frequencies for first 10,000 rows of rx2v1c3 variable in nhamcsed2015 dataset :

   For RX2, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,811       98.11       98.11
        040 |         21        0.21       98.32
        057 |        166        1.66       99.98
        113 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017