 In 2001, the Council commissioned the first proficiency tests for indigenous languages in Taiwan.In 2005, the Council established a romanized writing system for all Taiwanese indigenous languages.The annual exam later began to wane in popularity; in 2009, the proficiency test for the Thao, Saaroa, and Tona Rukai languages had no participants, and the passing rate of test-takers dropped five percent from the previous year.