Frequencies for first 10,000 rows of drg4ing4 variable in nhamcsed2004 dataset :

  ingredient code #4 for medication |
                                 #4 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                 magnesium antacids |          1        0.01        0.01
                      potassium ion |          1        0.01        0.02
                         riboflavin |          1        0.01        0.03
                    stearyl alcohol |          1        0.01        0.04
                           thiamine |          6        0.06        0.10
                   atropine sulfate |          2        0.02        0.12
             hydrocortisone acetate |          1        0.01        0.13
                hyoscyamine sulfate |         14        0.14        0.27
                                  . |      9,973       99.73      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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