the bar graph illustrates the key information about the drug’s selling in three different countries america , eruope and asia , during 4 years period from 2002 to 2006 .
overall , it is clear from the graph that american and eruopean drugs commerce had a slightly decreased during the course of years , where as asia was dramatically going to the top of the list of drugs sales .
according to what is shown , during the first three years american sales dropped from 41 to 35 percent and then to 27 percentage , on the contrary , asian and eruopean sales increased from 25 and 34 percent in 2002 to 30 and 35 percent in 2003 until 35 and 38 percent in 2004 respectively .
in terms of the last two years in the period , it was noticed that america backed to raise thier sales to 29 and 30 percent , also asia did the same thing by continued in ascending action to 37 then 40 percent , so became on the top of the list , on the other hand , eruopean sales suddenly had reduced to 34 again and 30 percent at last equally with amedica