Year	U.S. dollars (Units)
2001	15723.751
2002	16733.977
2003	18461.835
2004	23005.586
2005	25109.973
2006	28970.428
2007	34268.703
2008	38286.226
2009	39822.349
2010	51135.159
2011	66111.715
2012	74209.139
2013	84833.692
2014	86298.091
2015	69647.776
2016	69887.828
2017	77145.531
2018	82695.455
2019	81051.047
2020	37100.934
2021	45329.598
2022	36361.139
2023	69079.722
2024	78962.240
2025	87834.545
2026	92724.425
2027	96857.826
2028	101206.886
2029	105985.776