Year	current US$
2006	19579999.9274313
2007	18170000.165700898
2008	19549999.833107002
2009	14440000.072121602
2010	20930000.0797957
2011	14810000.0116974
2012	13289999.963715699
2013	17419999.9626726
2014	18400000.0096858
2015	14285513.0136013
2016	15460400.5599394
2017	16680205.278098602
2018	20700448.5577345
2019	16159456.402063401
2020	17608822.3345578
2021	18660604.834556602
2022	20267555.341124535