Year	current US$
1995	192839529.353313
1996	191397035.711877
1997	183107566.85523
1998	177370023.649979
1999	169416603.490941
2000	176993161.811247
2001	179134749.71351
2002	167824111.603912
2003	168752967.028302
2004	169700109.379521
2005	172058102.825193
2006	176617985.462981
2007	197018270.951399
2008	236265713.708661
2009	225904539.478023
2010	248170520.064857
2011	274272173.326838
2012	270705774.206675
2013	298762381.494444
2014	299443068.605758
2015	283881470.179822
2016	290269980.960632
2017	308435720.097818
2018	326156556.863308
2019	344467717.329737
2020	373533862.365461
2021	422143419.345285