Year	current US$
1989	1302.0564238081386
1990	1204.05826608729
1991	929.7716244201346
1992	813.8629882832205
1993	845.1029888558854
1994	968.6290528636491
1995	1196.8293287380375
1996	1162.1881649682985
1997	1158.987139634782
1998	1422.191543300449
1999	1226.4344932825813
2000	1282.5884380943637
2001	1408.8309911666202
2002	1585.2981546660371
2003	2008.7800916593083
2004	2628.1379047303603
2005	3585.4286188495607
2006	4513.145976913148
2007	6573.778987614795
2008	8526.609261186271
2009	6961.115023444521
2010	6749.996828964486
2011	7534.116193422092
2012	7016.996323218849
2013	7498.974512791455
2014	8035.84558101548
2015	7210.654432286133
2016	7538.8659461541665
2017	8658.807083659036
2018	10026.95212506895
2019	10527.767514500418
2020	10801.983540459583
2021	12194.363628164101