Frequencies for first 10,000 rows of rx4v1c3 variable in nhamcsed2014 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,923       99.23       99.23
        040 |         12        0.12       99.35
        057 |         62        0.62       99.97
        097 |          1        0.01       99.98
        113 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017