Year	current US$
2000	278.33460469
2001	292.82457321
2002	328.98641914
2003	474.16124342
2004	551.31099763
2005	586.05003438
2006	625.56856829
2007	721.85939213
2008	800.19355029
2009	732.30716258
2010	712.89516963
2011	771.33081777
2012	722.46303241
2013	762.37550006
2014	796.77074168
2015	673.8223035
2016	676.07420397
2017	744.57546569
2018	816.26521855
2019	800.16277577
2020	778.54212882
2021	918.39255754