Year	constant 2015 US$
1996	2295.9346522313595
1997	1965.2968951052064
1998	2211.935358743697
1999	2414.1488246677914
2000	2570.793251104699
2001	2698.0943770044864
2002	2769.521556045938
2003	2857.6351428272587
2004	3070.586958212541
2005	3156.979937443187
2006	3328.047001570596
2007	3549.859822322924
2008	3802.370528947298
2009	3808.7219677392154
2010	4272.923664481154
2011	3771.093309662073
2012	4094.60582809698
2013	4801.1447919354705
2014	5138.478910328539
2015	5035.574948674032
2016	5008.708339227468
2017	5116.036731341115
2018	5088.229738014881
2019	5107.594634972018
2020	5575.3563205578685
2021	5652.868821677863
2022	5617.509113101357