Passage: The education system features a non-compulsory kindergarten education followed by six years of compulsory primary education, and five years of optional secondary education. Schools in the primary education system are divided into two categories: national primary schools, which teach in Malay, and vernacular schools, which teach in Chinese or Tamil. Secondary education is conducted for five years. In the final year of secondary education, students sit for the Malaysian Certificate of Education examination. Since the introduction of the matriculation programme in 1999, students who completed the 12-month programme in matriculation colleges can enroll in local universities. However, in the matriculation system, only 10 per cent of places are open to non-bumiputera students.

Question: What year did the matriculation system happen?
1999