Frequencies for first 10,000 rows of rx7v1c3 variable in nhamcsed2015 dataset :

   For RX7, |
 level 1 of |
MULTUM drug |
category #3 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,980       99.80       99.80
        040 |          2        0.02       99.82
        057 |         17        0.17       99.99
        105 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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