were granted asylum, while those arriving later in the 1990s more often obtained temporary status. There has also been some secondary migration of Somalis to the UK from the Netherlands and Denmark. The main driving forces behind this secondary migration included a desire to reunite with family and friends and for better employment opportunities. Non-European immigration rose significantly during the period from 1997, not least because of the government's abolition of the primary purpose rule in June 1997. This change made it easier for UK residents to bring foreign spouses into the country. The former government adviser Andrew Neather in the Evening Standard stated that the deliberate policy of ministers from late-2000 until early-2008 was to open up the UK to mass migration. The Immigration Rules, under the Immigration Act 1971, were updated in 2012 (Appendix FM) to create a strict minimum income threshold for non-EU spouses and children to be given leave to remain in the UK. These rules were challenged in the courts, and in 2017 the Supreme Court found that while "the minimum income threshold is accepted in principle" they decided that the rules and guidance were defective and unlawful until amended to give more weight to the interests of the children involved, and that sources of funding other than the British spouse's income should be considered. The foreign-born population increased from about 5.3 million in 2004 to nearly 9.3 million in 2018. In the decade leading up to 2018, the number of non-EU migrants outnumbered EU migrants while the number of EU migrants increased more rapidly. EU migrants were noted to be less likely to become British citizens than non-EU migrants. In January 2021, analysis by the Economic Statistics Centre of Excellence suggested that there had been an "unprecedented exodus" of almost 1.3 million foreign-born people from the UK between July 2019 and September 2020, in part due to the burden of job losses resulting from the COVID-19 pandemic falling disproportionately on foreign-born workers. Interviews conducted by Al Jazeera suggested that Brexit may have been a more significant push factor than the pandemic. Subsequent analysis of the impact of the pandemic on population statistics generated by the Labour Force Survey (LFS) suggests that "LFS-based estimates are likely to significantly overstate the change in the non-UK national population". Payroll data shows that the number of EU workers fell by 7 percent between October–December 2019 and October–December 2020.