Year	current US$
2001	8180634.923665949
2002	9230047.92003955
2003	13135553.756786032
2004	12338723.74534318
2005	8455324.24273919
2006	9659775.75399532
2007	20275585.2271173
2008	23040533.04975871
2009	18836917.33415027
2010	25802300.84598564
2011	34759470.60756467
2012	25371287.073690742
2013	20983384.37607675
2014	24445692.993775003
2015	22616787.1405563
2016	30918080.8508446
2017	32995047.076059118
2018	34649948.45353304
2019	37310862.2437897
2020	24385713.15866968
2021	25656886.012243718
2022	28705430.96952299