Year	current US$
2000	116.91142572
2001	133.11698683
2002	123.92898568
2003	152.46149099
2004	196.82312561
2005	326.00321651
2006	173.14716993
2007	188.87850126
2008	206.01288824
2009	255.87874012
2010	285.86860918
2011	277.49917052
2012	281.37359552
2013	262.83122554
2014	236.27734536
2015	257.52748318
2016	282.00851549
2017	290.38991981
2018	301.12297947
2019	290.24545141
2020	289.63978012
2021	314.94462172