Year	constant 2015 US$
1991	2699.687220792807
1992	3466.797520334595
1993	3216.327606643107
1994	2718.7598118917263
1995	2170.599398394031
1996	2133.8155387921515
1997	2137.5775844953896
1998	1751.6055105149255
1999	2143.7051488610246
2000	2082.24817359028
2001	2409.764649412693
2002	2442.390628241501
2003	2467.2112277667397
2004	2549.6056122527702
2005	2788.4769873498367
2006	2971.769995350192
2007	3174.509696205201
2008	2975.6960683399725
2009	3441.4309346649334
2010	3066.0024979321583
2011	4095.8516948091988
2012	3477.271601636416
2013	4052.1392025534483
2014	4493.093050917572
2015	5623.64475252455
2016	6523.039271871946
2017	7084.42241861918
2018	7897.041693351368
2019	8140.194081404362
2020	8823.189143374453
2021	8632.839213968919
2022	9535.50467793791