Frequencies for first 10,000 rows of rx2v1c3 variable in namcs2011 dataset :

   For RX2, |
 level 1 of |
MULTUM drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,928       99.28       99.28
        040 |         11        0.11       99.39
        057 |         49        0.49       99.88
        097 |          8        0.08       99.96
        105 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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