Reversing a five-year growth trend, enrollment at California's community colleges dipped 1%, or about 21,000 students, this school year as campuses pared courses because of state budget cuts, Chancellor Jack Scott said Wednesday.The downward trend is likely to continue next year unless state funding increases, Scott said in a telephone news briefing that projected a challenging future for the nation's largest system of public higher education. California's 112 community colleges educate about 2.9 million students annually.