Year	current US$
1989	2090.4564136072327
1990	2344.1004576815726
1991	2498.354158586105
1992	2691.170316882414
1993	2708.327748936736
1994	2871.9806496725514
1995	3303.0431615912557
1996	3434.201768265691
1997	3523.80432709099
1998	3621.253359199097
1999	3656.2835461088785
2000	3817.4739432526617
2001	3870.9824949641393
2002	4128.395229372811
2003	4791.75682370899
2004	5434.704124854874
2005	5960.319170246186
2006	6647.297036736113
2007	7666.7759577600755
2008	8500.93106633806
2009	7601.310115305997
2010	7820.003159919781
2011	8455.613980942477
2012	8673.83798181049
2013	9014.125121070269
2014	9195.79225047163
2015	8645.609617432247
2016	8831.431283939517
2017	9558.457827109229
2018	10024.674854037543
2019	10119.80710652685
2020	8935.926142482956
2021	9850.164032215664