around $16 billion a year worldwide on bras. In the US during 2012, women owned an average of nine bras and wore six on a regular basis. That increased from 2006, when the average American woman owned six, one of which was strapless, and one in a colour other than white. British women in a 2009 survey reported that they owned an average of 16 bras. The average bra size among North American women has changed from 34B in 1983 to a 34DD in 2012–2013, and from 36C in 2013 to 36DD in the UK during 2014–2015. The change in bra size has been linked to growing obesity rates, breast implants, increased birth control usage, estrogen mimicking pollutants, the availability of a larger selection of bras, and women wearing better fitting bras. Bras are made in Asian countries, including Sri Lanka, India, and China. While there has been some social pressure from the anti-sweatshop and anti-globalization movements on manufacturers to reduce use of sweatshop labour, most major apparel manufacturers rely on them directly and indirectly. Prior to 2005, a trade agreement limited textile imports to the European Union and the US. China was exporting US$33.9 billion in textiles and clothing each year to the EU and the US. When those quotas expired on 1 January 2005, the so-called Bra Wars began. Within six months, China shipped 30 million more bras to the two markets: 33 per cent more to the US and 63 per cent more to the EU. , an average bra cost £29.80. , Africa imported US$107 million worth of bras, with South Africa accounting for 40 per cent. Morocco was second and Nigeria third, while Mauritius topped purchasing on a per capita basis. In countries where labour costs are low, bras that cost US$5–7 to manufacture sell for US$50 or more in American retail stores. , female garment workers in Sri Lanka earned about US$2.20 per day. Similarly, Honduran garment factory workers in 2003 were paid US$0.24 for each $50 Sean John sweatshirt they made, less than one-half of one per cent of the retail price. In 2009, residents in the textile manufacturing city of Gurao in the Guangdong province of China made more than 200 million bras. Children were employed to assemble bras and were paid 0.30 yuan for every 100 bra straps they helped assemble. In one day they could earn 20 to 30 yuan.