Frequencies for first 10,000 rows of rx4v2c3 variable in namcs2013 dataset :

   For RX4, |
 level 2 of |
MULTUM drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,970       99.70       99.70
        064 |         13        0.13       99.83
        065 |          8        0.08       99.91
        101 |          1        0.01       99.92
        270 |          4        0.04       99.96
        433 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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