Frequencies for first 10,000 rows of rx4v3c3 variable in namcs2012 dataset :

   For RX4, |
 level 3 of |
MULTUM drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,970       99.70       99.70
        185 |          3        0.03       99.73
        197 |          8        0.08       99.81
        203 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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