Year	kg per 2010 US$ of GDP
1992	1.78336539864746
1993	0.857737451021811
1994	0.861662781045008
1995	1.01574857622087
1996	0.721151321305815
1997	0.880701786047013
1998	0.853355330579219
1999	0.74051194097783
2000	0.80388902009793
2001	0.750071569641902
2002	0.569389960138719
2003	0.562448920007719
2004	0.541280013385348
2005	0.567666626433729
2006	0.504860951611071
2007	0.512919483699429
2008	0.526716609873431
2009	0.481193010347242
2010	0.455390954849264
2011	0.507187633785868
2012	0.54791923717721
2013	0.51197222907955
2014	0.497148756473147