Year	constant 2015 US$
1991	7442.645085470578
1992	7548.066149871868
1993	7695.48731297958
1994	7687.8622289955865
1995	7584.196314156771
1996	7674.924224553988
1997	7841.508132587538
1998	7894.162929178954
1999	8047.555143878925
2000	8200.020381127548
2001	8345.134179397337
2002	8451.572129652683
2003	8588.521062511078
2004	8856.760546448539
2005	9233.156103066109
2006	9630.499202940156
2007	10329.52334873659
2008	10747.935355204445
2009	10977.878118982035
2010	11456.69707186413
2011	11834.041978296662
2012	12246.488659148086
2013	12482.417416891147
2014	12713.115148168012
2015	12952.04039116411
2016	13317.209272457883
2017	13762.797031703583
2018	14188.596817775417
2019	14551.759659929976
2020	14795.401383069135
2021	15366.744535364369
2022	15625.517318670689