70 per cent of the population belong to the Hoklo ethnic group and speak Hokkien natively in addition to Mandarin. The Hakka group, comprising some 14–18 per cent of the population, speak Hakka. Although Mandarin is the language of instruction in schools and dominates television and radio, non-Mandarin Chinese varieties have undergone a revival in public life in Taiwan, particularly since restrictions on their use were lifted in the 1990s.