Frequencies for first 10,000 rows of rx20v1c2 variable in nhamcsed2015 dataset 

  For RX20, |
 level 1 of |
MULTUM drug |
category #2 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,996       99.96       99.96
        040 |          1        0.01       99.97
        115 |          1        0.01       99.98
        122 |          1        0.01       99.99
        242 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017