Complex sentence: Since the school opened in 1980, Mountain View has won over 70 State Championships and over 110 Region Championships.The great majority of these titles were won during a ten year period from 1992 to 2002.
Split into simpler sentences: Since the school opened in 1980, Mountain View has won over 70 State Championships and over 110 Region Championships. Nearly all of these titles were won during a ten year period from 1992 to 2002.