Year	U.S. dollars (Units)
1995	8978.862
1996	9107.638
1997	9147.980
1998	9621.951
1999	9983.877
2000	10482.000
2001	10447.791
2002	11346.456
2003	13730.313
2004	15260.887
2005	15930.142
2006	16818.012
2007	19696.182
2008	22378.184
2009	21223.678
2010	21842.065
2011	23222.385
2012	22674.787
2013	24972.679
2014	27080.097
2015	25228.175
2016	25897.872
2017	29284.984
2018	32397.208
2019	32430.420
2020	29613.002
2021	35140.019
2022	35263.992
2023	38673.584
2024	41738.084
2025	43878.770
2026	46110.644
2027	48351.430
2028	50683.081
2029	53064.306