Year	current US$
1997	-17393771.9551971
1998	-417182098.373199
1999	-197899933.560412
2000	-63363457.3758929
2001	17774958.6196079
2002	-3978759.37561058
2003	-94308357.9846846
2004	35733155.5194366
2005	60277558.6347537
2006	28978780.0042426
2007	485142547.000881
2008	155672601.412006
2009	656222691.069824
2010	218984284.263943
2011	250043742.473696
2012	108210104.514402
2013	-508668323.362084
2014	-546118749.365876
2015	-565680517.252259
2016	482848051.142073
2017	711775136.489371
2018	906875722.378258
2019	483799072.692592
2020	1030245486.80463
2021	-174985270.033037