Year	kg per 2010 US$ of GDP
1992	6.14896758468216
1993	6.5428712651718
1994	6.45234379034983
1995	6.19762253715832
1996	6.25519482903967
1997	6.00555923892948
1998	6.39750009031204
1999	6.33404766515296
2000	6.0402928239502
2001	5.87616106800157
2002	5.87570537211156
2003	5.58412031403105
2004	5.15907380439874
2005	4.48115168662377
2006	4.27852511173178
2007	3.90543290377964
2008	3.69226867673857
2009	2.95466452936585
2010	2.64838877454598
2011	2.66927060933508
2012	2.51368175996626
2013	2.07656944990584
2014	1.97232267017577