Year	constant 2015 US$
2000	10473.34366047142
2001	11080.55691255659
2002	11447.877201242809
2003	11374.953786840682
2004	11927.522210442823
2005	12404.174133195276
2006	12611.997310125667
2007	13020.1525152443
2008	12583.89426238148
2009	12342.9934531535
2010	12170.574736890123
2011	12587.244638089405
2012	12844.404266832593
2013	13139.332811021817
2014	13658.277677696911
2015	15402.496430503259
2016	15650.215639967677
2017	15202.602706099971
2018	14933.429981032532
2019	15260.934937108459
2020	14537.735490508161
2021	12631.38874846978
2022	12066.781478170333