title: American Indian Model Schools
context: American Indian Model Schools (AIM Schools) is a charter school system based in Oakland, California.[2] Started with the American Indian Public Charter School, a middle school in the late 1990s to serve Native American students, in 2007 it expanded to include another middle school and a high school. The main campus is in the Laurel area and includes American Indian Public Charter School (AIPCS), a middle school of grades 5-8, and American Indian Public High School (AIPHS), a high school (9-12). AIPHS students can also take select classes at Merritt College. American Indian Public Charter School II (AIPCS II) has grades K-8 at a second campus located in Oakland's Chinatown. By 2012 the student population of the AIM schools had become 90% Asian American.
question: When was the American Indian Model Schools system established?
answers: 1990s