Year	current US$
1990	2405.535160407848
1991	2691.195652262611
1992	2920.9175423418596
1993	3102.2968587771215
1994	3771.3595157828827
1995	4819.125554709868
1996	5196.940379659316
1997	5146.671078270842
1998	5538.616464771836
1999	5645.581395842328
2000	5426.624281193057
2001	5722.168182808297
2002	6564.6963137366465
2003	8731.937368243807
2004	10691.446549525903
2005	11690.11346894073
2006	13170.784980467546
2007	16106.0604446695
2008	18753.584941381567
2009	16597.208458136094
2010	16908.84795648763
2011	18509.740215754096
2012	17498.353900259353
2013	18276.009551654624
2014	18719.988140937126
2015	16390.882174850707
2016	16563.44049712289
2017	17585.197002256966
2018	19486.39368455051
2019	19381.890546874612
2020	19553.260961364253
2021	21765.722502092995
2022	21279.458924772887
2023	24470.23853788296