Frequencies for first 10,000 rows of rx4v1c3 variable in namcs2012 dataset :

   For RX4, |
 level 1 of |
MULTUM drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,961       99.61       99.61
        040 |          5        0.05       99.66
        057 |         27        0.27       99.93
        097 |          3        0.03       99.96
        105 |          2        0.02       99.98
        113 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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