Year	constant 2015 US$
1995	2942.302728058721
1996	3110.952524032406
1997	3173.407018652696
1998	3541.52832034344
1999	3114.048462261905
2000	4023.2990342993157
2001	5717.660605470545
2002	5969.384110406822
2003	6501.948330117484
2004	7534.575584173191
2005	8369.221441729205
2006	10724.12602610269
2007	13766.794553903559
2008	17052.0925870853
2009	18792.213541892663
2010	16509.434241741146
2011	20275.945619301136
2012	18915.158137616927
2013	22655.57807876973
2014	30321.9139207715
2015	25341.18469279561
2016	29498.315832139688
2017	29117.622163261443
2018	38391.65270748764
2019	26549.821485437344
2020	29671.084377488078
2021	23324.244700507046
2022	24983.729132669327