Among the Asian population, 6.1% are Vietnamese, followed by Koreans (2.9%), Chinese (2.7%), Filipinos (2.4%), Indians (1.4%), Japanese (1.1%), Cambodians (0.2%) Pakistanis (0.2%), Thais (0.1%), Indonesians (0.1%), and Laotians (0.1%). According to KPCC in 2014, Orange County has the largest proportion of Asian Americans in Southern California, where one in five residents are Asian American. There is also a significant Islam in the United States population in the county.. How many less percent of Indonesians than Japanese in the Asian population?