Year	current US$
1998	1405.816326698536
1999	1367.9025733509702
2000	1627.065119119869
2001	1909.5987018617886
2002	2106.6350684522995
2003	2789.159064835086
2004	3380.1651213585906
2005	3674.617924279698
2006	4425.678873078031
2007	5976.394144545959
2008	7367.751909108816
2009	6727.107766769686
2010	6688.402596413458
2011	7328.789430854982
2012	6586.39970256684
2013	7188.863616112712
2014	7387.872969175478
2015	6517.192675147636
2016	7033.439623983732
2017	7803.358244652033
2018	8850.374924837204
2019	8909.653875912598
2020	7677.371321068167
2021	9465.961530277938
2022	10093.43870072661
2023	12016.90742190603