Year	kg per 2010 US$ of GDP
1980	2.71239353287204
1981	2.68101268895168
1982	2.93899164287046
1983	2.84891773912219
1984	2.66387376331004
1985	2.65882900535044
1986	2.60810755597779
1987	2.46207135805405
1988	2.11395224096199
1989	2.17209046611894
1990	2.05221931429818
1991	1.73199139842294
1992	1.75928501880998
1993	2.23558974208719
1994	1.75240884182043
1995	1.82456437871972
1996	1.76666815378793
1997	1.6300158977939
1998	1.45495889672832
1999	1.42589122519684
2000	1.34707024485051
2001	1.38528223456984
2002	1.25644177176369
2003	1.26639398239187
2004	1.17709714302689
2005	1.12499509473895
2006	1.07623639733303
2007	1.0693911855518
2008	0.97941818151008
2009	0.854187404741836
2010	0.871645114823468
2011	0.956719482417382
2012	0.866516506074643
2013	0.763740170308812
2014	0.803294897996175