2015. The top three source markets include the United Kingdom (17%), Singapore (10%), and New Zealand (10%) with the majority of purpose for visitation being holiday/vacation reasons. The tourism industry contributes $9.3 billion to the Western Australian economy and supports 94,000 jobs within the state. Both directly and indirectly, the industry makes up 3.2% of the state's economy whilst comparatively, WA's largest revenue source, the mining sector, brings in 31%. Tourism WA is the government agency responsible for promoting Western Australia as a holiday destination. Government Western Australia was granted self-government in 1890 with a bicameral Parliament located in Perth, consisting of the Legislative Assembly (or lower house), which has 59 members; and the Legislative Council (or upper house), which has 36 members. Suffrage is universal and compulsory for citizens over 18 years of age. With the federation of the Australian colonies in 1901, Western Australia became a state within Australia's federal structure; this involved ceding certain powers to the Commonwealth (or Federal) government in accordance with the Constitution; all powers not specifically granted to the Commonwealth remained solely with the State. However over time the Commonwealth has effectively expanded its powers through broad interpretation of its enumerated powers and increasing control of taxation and financial distribution (see Federalism in Australia). Whilst the sovereign of Western Australia is the King of Australia (Charles III) and executive power is nominally vested in his state representative, the Governor (currently Chris Dawson), executive power rests with the premier and ministers drawn from the party or coalition of parties holding a majority of seats in the Legislative Assembly. Mark McGowan is the premier, having defeated Colin Barnett at the state election on 11 March 2017 and retained power at the 2021 election. Secession Secessionism has been a recurring feature of Western Australia's political landscape since shortly after European settlement in 1826. Western Australia was the most reluctant participant in the Commonwealth of Australia. Western Australia did not participate in the earliest federation conference. Longer-term residents of Western Australia were generally opposed to federation; however, the discovery of gold brought many immigrants from other parts of Australia. It was these residents, primarily in Kalgoorlie but also in Albany who voted to join the Commonwealth, and the proposal of these areas being admitted separately under the name Auralia was considered. In a referendum in April 1933, 68% of voters voted for the state to leave the