Year	constant 2015 US$
1991	6199.626983242167
1992	6887.246628478666
1993	7154.209168591376
1994	7489.251921961512
1995	7154.829150170211
1996	7058.108927537964
1997	6573.717641184082
1998	7707.387035722892
1999	7122.704291936646
2000	7642.830968228909
2001	7457.714505213132
2002	7696.507334878363
2003	10213.566595782157
2004	11501.969010766903
2005	12042.54408062102
2006	10925.317536700946
2007	9247.983119445858
2008	9056.221774081287
2009	9059.974106714351
2010	9443.660474333274
2011	8409.632991532331
2012	9412.197525190923
2013	9242.107939818405
2014	9250.121150020681
2015	8045.684774464317
2016	6714.35744409113
2017	7805.991196904935
2018	7543.556573406167
2019	7492.490924671117
2020	7500.497556081777
2021	8700.825935142173
2022	8412.00840531136