Partly by design, both overall enrollment and the size of the freshman class are down slightly this year at the University of Colorado at Boulder but despite the overall downsizing, ethnic minority undergraduate enrollment is up, according to census figures released today. Following a record freshman class of almost 5,600 in 2003, a reduction in freshman enrollment to 5,000 was planned over two years to moderate the impact of rapid growth over the last 10 years, especially in the number of undergraduates.