Frequencies for first 10,000 rows of drug6cl3 variable in nhamcsed2005 dataset :

          ndc code #3 for medication #6 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
repl/regs of electrolytes/water balance |          1        0.01        0.01
                        anticonvulsants |          4        0.04        0.05
ocular anti-infective/anti-inflammatory |          1        0.01        0.06
                           antipyretics |          5        0.05        0.11
         antiasthmatics/bronchodilators |          1        0.01        0.12
                         antihistamines |          9        0.09        0.21
                          surgical aids |          5        0.05        0.26
                                      . |      9,974       99.74      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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