Year	kg per 2015 US$ of GDP
2000	0.1737068771821037
2001	0.19366828118374554
2002	0.19408903166387884
2003	0.21013749586663694
2004	0.16197336171964816
2005	0.22105080599270868
2006	0.24424589081043013
2007	0.26758411890080147
2008	0.3956133532514081
2009	0.4885175843466518
2010	0.55853900427753
2011	0.7757347439784814
2012	0.5871299991814509
2013	0.5120868865905596
2014	0.4921047546618268
2015	0.5256336101222481
2016	0.4750378342642521
2017	0.4990269494908474
2018	0.5398863644988409
2019	0.5321800314930399
2020	0.4223396425043372