The California system has been a focus and origin of many trends in prison conditions within the United States as a whole. The state's large and diverse population, large size, large urban areas, history of gang and drug-related crime, tough sentencing laws and its status as an entry point to the U.S. for both immigrants and drugs has given California a large and complex prison environment. With more than 170,000 prisoners occupying facilities designed for 83,000, California prisons are overcrowded, with most facilities holding more than 200% of their design capacity, forcing prisoners to triple-bunk in open gymnasiums and day rooms.