Year	constant 2015 US$
1995	1339.5275707975343
1996	1454.7680717740907
1997	1569.3811843166554
1998	1659.4592929127696
1999	1766.0035069288645
2000	1897.071568280966
2001	2025.357302058728
2002	2190.83031383551
2003	2390.955336136169
2004	2613.297503341711
2005	2866.1508073803284
2006	3206.3198511983014
2007	3632.687207205937
2008	3958.4161836665053
2009	4252.808470333159
2010	4651.021685903643
2011	5010.769442857101
2012	5381.965956465088
2013	5709.739877455013
2014	6121.033870499427
2015	6454.861265497285
2016	6832.5874288891155
2017	7263.885308853019
2018	7673.326023469252
2019	8090.582289479957
2020	8135.263513261201
2021	8742.604332853967
2022	9027.510305137876