Year	constant 2015 US$
1991	3282.8237561458936
1992	3099.0194537014518
1993	3151.0988952489124
1994	3252.7970769724443
1995	3455.2688324294318
1996	3678.4677816619487
1997	3245.789754612453
1998	3960.9116779209407
1999	3748.701500426792
2000	4317.703034053827
2001	4476.680771700547
2002	4447.789393449325
2003	4739.433060885616
2004	4976.244668606494
2005	4628.13703939817
2006	4964.248106877955
2007	5238.593284798647
2008	5251.158865190954
2009	5062.533918627238
2010	5053.34355770098
2011	4898.697464824439
2012	4999.885935943059
2013	5096.290233030685
2014	5156.590783178119
2015	5317.631282717396
2016	5497.854961295221
2017	5558.570527474208
2018	5699.172541497583
2019	5715.067793851518
2020	6174.929743290552
2021	5922.610619651829
2022	5985.848123191803