Year	current US$
2000	40.18200645
2001	31.75071323
2002	19.97301629
2003	23.41975943
2004	28.39135639
2005	31.08970292
2006	42.76169573
2007	55.44451994
2008	70.66304641
2009	83.17725976
2010	100.22639995
2011	142.09700768
2012	170.48691886
2013	170.7275421
2014	209.60193794
2015	185.01935135
2016	181.29273396
2017	185.72178625
2018	189.14869046
2019	192.7539103
2020	221.26360415
2021	266.1547476