Year	kg per 2010 US$ of GDP
1990	0.36217999176888
1991	0.341665768372194
1992	0.295609904870016
1993	0.284304648701016
1994	0.253690901398479
1995	0.240582457877871
1996	0.236781686002025
1997	0.240240363150401
1998	0.236029904978548
1999	0.249337306210328
2000	0.2908316646056
2001	0.331464699711408
2002	0.341013074394147
2003	0.327646577474721
2004	0.312346678523007
2005	0.296284522064176
2006	0.283335907395683
2007	0.28747793305399
2008	0.27935967294328
2009	0.304755317221366
2010	0.290710789204733
2011	0.256821559607332
2012	0.245632051151601
2013	0.242851888474706
2014	0.237507748684666