Year	U.S. dollars (Units)
1992	9639.353
1993	8357.938
1994	8468.242
1995	10748.462
1996	10810.791
1997	10470.497
1998	11168.219
1999	11509.456
2000	10259.439
2001	10502.321
2002	11804.818
2003	14873.628
2004	17254.827
2005	18152.062
2006	19723.859
2007	23912.494
2008	27744.280
2009	24854.160
2010	23570.184
2011	25156.069
2012	22674.365
2013	23516.591
2014	24263.895
2015	20898.860
2016	21681.281
2017	23511.316
2018	26224.257
2019	26138.955
2020	25617.868
2021	29338.031
2022	28526.671
2023	32233.058
2024	34026.494
2025	35429.874
2026	37077.084
2027	38790.722
2028	40628.499
2029	42508.741