Frequencies for first 10,000 rows of rx4v1c3 variable in nhamcsed2010 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,924       99.24       99.24
        040 |          9        0.09       99.33
        057 |         63        0.63       99.96
        105 |          1        0.01       99.97
        113 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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