Frequencies for first 10,000 rows of rx4v2c4 variable in namcs2015 dataset :

   For RX4, |
 level 2 of |
MULTUM drug |
category #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,985       99.85       99.85
        066 |         12        0.12       99.97
        104 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017