Frequencies for first 10,000 rows of rx4v1c4 variable in namcs2014 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,982       99.82       99.82
        057 |         16        0.16       99.98
        254 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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