Year	current US$
2000	64.09311151
2001	83.37766062
2002	88.94615568
2003	86.89922177
2004	88.05054548
2005	93.76015989
2006	108.76504947
2007	136.42510385
2008	165.72872913
2009	155.55213836
2010	161.47706609
2011	165.66773964
2012	162.34816234
2013	172.51472711
2014	184.20695787
2015	193.25900392
2016	204.3213449
2017	194.5283445
2018	196.69799545
2019	204.39003714
2020	197.38436723
2021	213.44393997