Year	U.S. dollars (Units)
1993	14556.850
1994	13583.236
1995	13879.046
1996	15039.415
1997	13740.332
1998	11423.286
1999	13359.806
2000	17009.468
2001	15116.579
2002	15756.242
2003	18796.658
2004	21585.518
2005	27012.212
2006	31903.746
2007	33711.963
2008	42823.645
2009	30414.905
2010	32216.413
2011	41657.542
2012	45522.558
2013	43927.638
2014	39759.385
2015	27035.985
2016	24800.694
2017	26816.642
2018	29905.292
2019	29037.471
2020	23017.708
2021	29756.639
2022	37624.950
2023	32638.041
2024	31723.933
2025	31679.561
2026	31648.050
2027	31895.839
2028	32301.842
2029	32858.403