Complex sentence: In 2006, the suicide rate in the United States Army increased by 37%, while in 2009, there were 344 completed suicides by military personnel (211 of whom were members of the Army).
Split into simpler sentences: In 2006, the suicide rate in the United States Army increased by 37%. Furthermore, in 2009, there were 344 completed suicides by military personnel (211 of whom were members of the Army).