Frequencies for first 10,000 rows of drg7ing3 variable in nhamcsed2003 dataset :

  ingredient code #3 for medication |
                                 #7 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                           caffeine |          1        0.01        0.01
                 magnesium antacids |          1        0.01        0.02
                         riboflavin |          1        0.01        0.03
                           thiamine |          2        0.02        0.05
                magnesium hydroxide |          1        0.01        0.06
                  gymnema sylvestre |          1        0.01        0.07
                                  . |      9,993       99.93      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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