Year	U.S. dollars (Units)
2000	1506.094
2001	1704.288
2002	1807.197
2003	2205.535
2004	2274.678
2005	2318.300
2006	2400.140
2007	2865.639
2008	3025.013
2009	2878.492
2010	3013.162
2011	3562.033
2012	3396.893
2013	3699.477
2014	3920.467
2015	3554.100
2016	3745.863
2017	3991.249
2018	4389.631
2019	4432.996
2020	4297.829
2021	5324.305
2022	5285.920
2023	5917.051
2024	6388.731
2025	6891.451
2026	7368.246
2027	7820.594
2028	8269.518
2029	8649.689