Year	current US$
2000	357.54137191559556
2001	357.7136047364564
2002	382.45215522173305
2003	436.81075230527495
2004	477.9464452656206
2005	500.34197230017423
2006	528.9164015003328
2007	569.7276834545279
2008	604.2407415410764
2009	585.8413275205727
2010	602.069874122749
2011	640.224443991765
2012	641.9404456477757
2013	644.2194538275521
2014	653.9671890293184
2015	618.17975830856
2016	628.8002504565837
2017	646.031458448971
2018	677.163601831979
2019	683.6619049936065
2020	660.802434603647
2021	737.3831207890184