The Chinese who arrived in the late 19th century to work in the gold mines left voluntarily or were expelled. Likewise most of the "Kanakas"—Polynesians—who came to work in the sugar fields were expatriated after 1901. Many Germans settled in South Australia, but those without Australian citizenship were put in camps during World War I and most were sent back to Germany after the war.
===Illegal immigration===
In 1999, there was a surge in illegal immigration to Australia.<ref name="Dawson">Dawson, Stephan (August 28, 2015). [https://ricochet.com/archives/how-australia-stopped-illegal-immigration/ How Australia Stopped Illegal Immigration]. ''Ricochet''. Retrieved August 18, 2016.</ref> The Liberal (the conservative party) prime minister [[John Howard]] cracked down on illegal immigration and by 2002, there was virtually no illegal immigration.<ref name="Dawson"/> In 2007, [[Kevin Rudd]] of the Labor party was elected prime minister, and because of his government's lenient immigration policy, the number of illegal immigrants skyrocketed, reaching over 20,000 people and 300 boats in the year 2013 alone.<ref name="Dawson"/> However, the government did not acknowledge that its lax policies were the reason for the growth in illegal immigration.<ref name="Dawson"/> In 2013, the Liberal Party was voted back into the government, and again instituted strict (and thus, controversial) policies again, and illegal immigration dropped to virtually zero, with only one boat arriving in 2014, and zero in 2015.<ref name="Dawson"/>
===Recent trends===