Year	current US$
1989	4437.354674796729
1990	2726.152527844446
1991	2408.1493992930773
1992	2676.8999486798784
1993	2957.734368844258
1994	3326.5784585205815
1995	3600.0312420921005
1996	3994.488619048543
1997	4337.2744535862785
1998	4345.702244497326
1999	4120.786298451633
2000	4177.335944930565
2001	4052.8168750640493
2002	3798.058235061307
2003	3780.459397291245
2004	4083.2148763624746
2005	4575.166318797846
2006	5277.295548340934
2007	6171.366766737212
2008	7128.1868928530885
2009	7291.763798717588
2010	8106.061144440247
2011	8936.18153482754
2012	9877.462409186395
2013	10295.63965152959
2014	10178.891452201162
2015	9175.606399817858
2016	8408.854659143068
2017	8281.265496601876
2018	8608.902060765433
2019	8701.723534230523
2020	7605.513663902775
2021	8086.604321292597
2022	8700.841292533936
2023	9438.291139587765