Frequencies for first 10,000 rows of rx4v2c3 variable in namcs2007 dataset :

   for rx4, |
 level 2 of |
multum drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,973       99.73       99.73
        064 |         15        0.15       99.88
        065 |          5        0.05       99.93
        101 |          3        0.03       99.96
        113 |          1        0.01       99.97
        270 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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