Frequencies for first 10,000 rows of rx1v2c4 variable in namcs2013 dataset :

   For RX1, |
 level 2 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,969       99.69       99.69
        066 |         27        0.27       99.96
        104 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017