Year	U.S. dollars (Units)
1992	427.863
1993	677.261
1994	740.970
1995	752.339
1996	914.348
1997	1037.893
1998	874.265
1999	664.990
2000	664.376
2001	784.864
2002	885.315
2003	1055.946
2004	1374.656
2005	1839.515
2006	2319.286
2007	3101.388
2008	3944.724
2009	2557.279
2010	2982.814
2011	3587.405
2012	3874.152
2013	4051.420
2014	3119.576
2015	2134.773
2016	2200.851
2017	2655.990
2018	3118.908
2019	3690.349
2020	3781.633
2021	4873.732
2022	4582.609
2023	5337.491
2024	5662.948
2025	5641.731
2026	5773.993
2027	5982.552
2028	6303.601
2029	6648.878