Year	current US$
2000	80.35888117
2001	44.5174765
2002	73.11430833
2003	73.35626203
2004	95.19696996
2005	109.54144697
2006	146.38131689
2007	153.90611153
2008	148.62743136
2009	175.81249431
2010	170.51743604
2011	153.64377602
2012	167.82512552
2013	184.60539132
2014	184.82787796
2015	281.86948176
2016	211.67113893
2017	189.45588255
2018	307.14981107
2019	431.89456873
2020	297.03579079
2021	175.22183074