Frequencies for first 10,000 rows of rx12v1c2 variable in nhamcsed2013 dataset :

  For RX12, |
 level 1 of |
MULTUM drug |
category #2 |
     (broad |
     level) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,990       99.90       99.90
        001 |          1        0.01       99.91
        040 |          3        0.03       99.94
        057 |          1        0.01       99.95
        122 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016