Year	constant 2015 US$
1995	2966.30409701994
1996	2872.538550257113
1997	2990.879748427949
1998	2971.088717811701
1999	3042.1925253558124
2000	4306.154193829513
2001	4505.9544513367355
2002	4491.859484194746
2003	4990.9283608085325
2004	5494.60245472289
2005	6505.695538679042
2006	6218.422407839208
2007	7320.637711705203
2008	8956.204498803074
2009	10619.833861032037
2010	10855.978843005028
2011	10797.708749661642
2012	12115.698916977193
2013	11660.155796374433
2014	13773.72263053545
2015	13184.276556498904
2016	13066.746204498999
2017	14825.10400718704
2018	13865.77966226787
2019	15906.013498231003
2020	16318.76558693736
2021	18017.93813030162
2022	18791.76366747516