Complex sentence: Still, registration dropped to 8,900 by 1997 then down to just over 7,000 by 2002 and the school enrollment dropped from 1,100 in 1997 to just over 700 in 2002.
Split into simpler sentences: Still, registration dropped to 8,900 by 1997 then down to just over 7,000 by 2002. School enrollment dropped from 1,100 in 1997 to just over 700 in 2002.