without doubt chewing gum is very p

without doubt chewing gum is very popular.Annual sales of gum in the U.S for example ,are over $ 2 billion.But perhaps this is not surprising when you learn that Amercians on average chew about 300 sticks of gum per person a year.Worldwide ,the Wrigley Company sells more than $ 4 billion of chewing gum each year that's a lot of gum