Year	U.S. dollars (Units)
2002	1741.529
2003	2075.674
2004	2385.564
2005	2348.707
2006	2464.219
2007	2865.977
2008	3186.846
2009	2759.034
2010	3133.042
2011	3777.342
2012	3609.113
2013	3615.373
2014	3583.652
2015	3396.690
2016	3798.272
2017	4255.250
2018	4498.998
2019	5046.827
2020	4820.260
2021	5571.914
2022	5454.782
2023	5722.541
2024	6001.056
2025	6300.646
2026	6571.578
2027	6896.939
2028	7217.367
2029	7542.866