Year	U.S. dollars (Units)
1992	120.002
1993	1590.588
1994	3683.029
1995	4637.509
1996	4916.983
1997	4832.443
1998	5324.026
1999	5179.026
2000	5053.112
2001	5363.399
2002	6215.467
2003	8191.829
2004	9717.962
2005	10452.380
2006	11505.751
2007	13764.592
2008	15896.067
2009	14406.811
2010	13706.348
2011	14651.806
2012	13446.713
2013	13978.833
2014	14006.157
2015	12098.452
2016	12577.143
2017	13585.885
2018	15046.079
2019	15122.974
2020	14258.411
2021	17821.244
2022	18583.329
2023	21347.327
2024	22966.106
2025	24111.468
2026	25391.013
2027	26633.582
2028	27935.496
2029	29259.664