 According to crime statistics, there were four homicides in Plano in 2006, the lowest homicide rate of all U.S. cities of 250,000 or more population.As of the 2000 U.S. Census, of the foreign-born residents, 17% were from China, 9% from India, and 4% from Vietnam; a total of 30% of foreign-born residents came from these three countries.That year, 22% of Plano's foreign-born originated in Mexico.