Year	U.S. dollars (Units)
2003	608.655
2004	1373.738
2005	1828.738
2006	2321.258
2007	3090.851
2008	4472.118
2009	3701.862
2010	4473.710
2011	5848.537
2012	6692.576
2013	7021.406
2014	6704.313
2015	5044.624
2016	4639.496
2017	5178.921
2018	5959.102
2019	5945.438
2020	4520.087
2021	5011.973
2022	6186.780
2023	5869.580
2024	5978.943
2025	6110.518
2026	6240.534
2027	6401.306
2028	6598.905
2029	6824.812