A/HRC/14/30/Add.3 period. The United Nations Global Migration Database shows a total of 3,389,925 international migrants residing in the United Kingdom in 1981 and 6,486,000 in 2007. The population survey carried out in 2007 showed a total of 60,975,000 inhabitants, suggesting that international migrants accounted for 10 per cent of the population.4 Also in 2007, other sources estimated the number of irregular migrants to be 618,000 (with a range of 417,000 to 863,000),5 which suggests that irregular migrants represented 9.5 per cent of all international migrants. 7. International migrants include European Union nationals. Figures published by the Office for National Statistics in December 2009 showed that between 2004 and 2008, migrants from Accession 8 (A8)6 countries living in the United Kingdom increased from 167,000 to 689,000.7 8. In 2001, around 2.1 million children — representing 16.3 per cent of the total child population — were from immigrant families. A fifth of those children were foreign-born and the remainder were born in the United Kingdom to at least one foreign-born parent. More than 40 per cent were from families from Asia, around 20 per cent from families from Africa and around 20 per cent from families from other countries in Europe. The main countries of origin include Bangladesh, Jamaica, India and Pakistan.8 Estimates also suggest that one child in six in the United Kingdom lives with at least one immigrant parent.9 9. During 2008 and 2009, the Home Affairs Committee conducted an inquiry into human trafficking, in which it highlighted the lack of accurate statistical information and estimated that there are at least 5,000 trafficked victims in the United Kingdom.10 Between April and September 2009, China and Nigeria were the main source countries for the 347 victims referred to the United Kingdom Human Trafficking Centre. Over the same period, there were also 31 female victims of sexual exploitation under 18 years old, which means that approximately 43 per cent of cases concerned trafficking of women for sexual exploitation. Between March 2007 and February 2008, 325 children from 52 different countries of origin were identified as potentially trafficked or exploited. Many of the children came from the United Kingdom, but also from Afghanistan, China, Nigeria, Romania and Viet Nam. Some of them have been forced to work in brothels and restaurants.11 4 5 6 7 8 9 10 11 4 Ibid. London School of Economics, Economic Impact on the London and UK Economy of an Earned Regularisation of Irregular Migrants to the UK (London, Greater London Authority, May 2009), para. 12. The eight countries that joined the European Union on 1 May 2004 are usually referred to as Accession 8 or A8 countries. They are: Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Slovakia and Slovenia. Office for National Statistics news release, “National statistician’s annual report on UK population statistics”, 8 December 2009. Heaven Crawley, “The Situation among Children in Immigrant Families in the United Kingdom”, Innocenti Working Papers, No. 2009-18 (Florence, UNICEF, 2009), p. 1. UNICEF, Children in Immigrant Families in Eight Affluent Countries: their family, national and international context (Florence, 2009), p. 13. See House of Commons, “The Trade in Human Beings: Human Trafficking in the UK”, Sixth Report, 2009, para. 28. See also Sally Almandras, Human trafficking: UK responses, Home Affairs, 11 March 2010, p. 5–6. (Standard Note SN/HA/4324). Available from http://www.parliament.uk/commons/lib/ research/briefings/snha-04324.pdf. Ibid., pp. 49–50. GE.10-12095