Complex sentence: When the Triennial Review in 1994 was completed the school enrollment was 490, in 2000 it was 691 and by 2003 it was around 750 where it remains as of 2008.
Split into simpler sentences: When the Triennial Review in 1994 was completed, the school enrollment was 490. In 2000, enrollment reached 691 and by 2003 it was around 750 where it remains as of 2008.