Frequencies for first 10,000 rows of rx4v1c3 variable in nhamcsopd2011 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,966       99.66       99.66
        040 |          2        0.02       99.68
        057 |         26        0.26       99.94
        097 |          3        0.03       99.97
        105 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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