Frequencies for first 10,000 rows of rx1v1c4 variable in nhamcsed2010 dataset :

   For RX1, |
 level 1 of |
MULTUM drug |
category #4 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,862       98.62       98.62
        040 |          1        0.01       98.63
        057 |        135        1.35       99.98
        254 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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