Year	kg per 2010 US$ of GDP
1992	3.70729922326518
1993	3.69471047058148
1994	3.92692538644805
1995	4.51486643442159
1996	4.63845403863538
1997	3.95689398799134
1998	3.88505621146449
1999	3.93918938792598
2000	3.58945499493518
2001	3.29587482488541
2002	3.10144495695028
2003	3.13181416026248
2004	2.72193022785242
2005	2.5694577790507
2006	2.33818318526907
2007	2.13874276596004
2008	2.02397413478588
2009	1.98564295117981
2010	2.23980803160469
2011	1.9965053526457
2012	2.05711452416194
2013	1.89129224016936
2014	1.69207524638532