Year	kg per 2010 US$ of GDP
1981	2.66072936676118
1982	2.49922888908946
1983	2.44341997327573
1984	2.12643737750625
1985	2.81544426037506
1986	2.75813571553405
1987	2.91756690521452
1988	3.04018665086722
1989	2.65984008642687
1990	2.59671078917622
1991	3.46201956811644
1992	3.45735346723596
1993	3.00848365021776
1994	2.52098868988022
1995	2.36221998008494
1996	2.34587690179266
1997	2.16420047860206
1998	2.09425373172226
1999	1.99126919733187
2000	1.95628271986507
2001	1.99578820104499
2002	2.00309236478533
2003	1.81481485610169
2004	1.74607790526583
2005	1.63008335328993
2006	1.64758292003463
2007	1.91908084007977
2008	1.75848596792518
2009	1.93841044214699
2010	1.92238096405262
2011	2.54958413818078
2012	2.76898473767332
2013	3.66464026597945
2014	1.82664531381112