Year	constant 2015 US$
1995	62473.33554007272
1996	61057.095954355456
1997	60691.31706611282
1998	60632.9373689392
1999	59396.53711227452
2000	59235.24403954617
2001	60038.39119492632
2002	58862.92648053142
2003	57793.234858473625
2004	57204.463931523154
2005	55551.823174167796
2006	55444.68760590981
2007	56013.08828469473
2008	56157.55873691784
2009	57058.28330180172
2010	57444.35869609569
2011	57847.54922475678
2012	58802.172125950485
2013	59545.3866881254
2014	59244.465826792635
2015	59629.594470425385
2016	59210.25080445408
2017	60015.49209168853
2018	60174.818353544404
2019	60156.34294584078
2020	55072.507045062
2021	56742.38152230435
2022	58868.163484516415