Frequencies for first 10,000 rows of rx9v1c3 variable in nhamcsed2012 dataset :

   For RX9, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,995       99.95       99.95
        040 |          1        0.01       99.96
        057 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016