Over 250 Indigenous Australian languages are thought to have existed at the time of first European contact, of which less than 20 are still in daily use by all age groups.[7][8] About 110 others are spoken exclusively by older people.[8] At the time of the 2006 census, 52,000 Indigenous Australians, representing 12% of the Indigenous population, reported that they spoke an Indigenous language at home.[9] Australia is home to many sign languages, its most widespread is known as Auslan, which is the main language of about 5,500 people.[10] Other sign languages include the various manual Indigenous languages like Eltye eltyarrenke, Rdaka-rdaka and Yolŋu Sign Language.