"In 1990, half of California’s marijuana possession arrestees were African-American, Latino, Asian, or other nonwhite and 35% were under age 20. In 2010, 64% were nonwhite and 52% were under age 20. Marijuana possession arrests of teenagers of color rose from 3,100 in 1990 to 16,400 in 2010 – an arrest surge 300% greater than population growth in that group."

Source

Males, Mike, "Misdemeanor marijuana arrests are skyrocketing and other California marijuana enforcement disparities," Center on Juvenile and Criminal Justice (San Francisco, CA: November 2011), p. 2.
http://www.cjcj.org...