The majority of Islanders are ProtestantChristians. In 1996, 37.4% identified as Anglican, 14.5% as Uniting Church, 11.5% as Roman Catholic and 3.1% as Seventh-day Adventist. Literacy is not recorded officially, but it can be assumed to be roughly at a par with Australia's literacy rate, as Islanders attend a school which uses a New South Wales curriculum, before traditionally moving to the mainland for further study. Islanders speak both English and a creole language known as Norfuk, a blend of 1700s English and Tahitian. The Norfuk language is decreasing in popularity as more tourists travel to the island and more young people leave for work and study reasons; however, there are efforts to keep it alive via dictionaries and the renaming of some tourist attractions to their Norfuk equivalents. In April 2005, it was declared a co-official language of the island. Emigration is growing as many Islanders take advantage of the close ties between Norfolk and Australia and New Zealand. The sole school on the island provides education to Australian Year 12; therefore, any student seeking to complete tertiary study must travel overseas. Additionally, the small economy of the island causes many skilled workers to emigrate as well.