Fewer of the immigrants were Malays, therefore the percentage resident population of the Malays began to fall. Indian residents, however, rose to 9.2% in 2010 due to an increase in the number of Indians migrant workers (compared to 7.4% Indians in the figures for citizens). The population profile of the country change dramatically after the relaxation of immigration policy, with a huge increase in the number of transient migrant workers. Official figures show that the number of foreigners on short-term permits (termed 'non-residents') has grown from 30,900 in 1970 to 797,900 in 2005, which translate roughly to a 24-fold increase in 35 years, or from 1% of the population in 1970 to 18.3% in 2005. Despite this huge increase, no further breakdown is given by Singstat. By 2010, the population of non-residents had increased to 25.7%. It was estimated in the mid-2010s that around 40% of Singapore's population were of foreign origin (permanent residents plus non-residents such as foreign students and workers including dependents). While the Singapore Department of Statistics reports overall population figures for Singapore (4.48 million in 2006), as a matter of policy, it only provides more detailed demographic breakdown analysis for the approximately 80% of the population (in 2006) who are Singapore citizens and Permanent Residents (collectively termed 'residents'). Of this group of about 3.6 million people in 2006, Chinese form 75.2%, Malays form 13.6%, Indians form 8.8%, while Eurasians and other groups form 2.4%. No breakdown by ethnicity is released for the non-resident population. Currently around 60,000 Europeans and 16,900 Eurasians live in Singapore, over 1% of its total population. There are four official languages: English, Malay, Mandarin and Tamil. Malay is the national language of the country, although English is the official language used. English serves as the link between the different ethnic groups and is the language of the educational system and the administration. The colloquial English-based creole used in everyday life is often referred to as Singlish. The government of Singapore has been promoting the use of Mandarin, the official form of Chinese in Singapore as well as mainland China and Taiwan, with its Speak Mandarin Campaign among the Chinese population. The use of other Chinese varieties, like Hokkien, Teochew, Cantonese, Hainanese and Hakka, has been declining over the last two decades, although they are still being used especially by the older generations of the Chinese population.