Year current US$ 2005 769999.980926514 2006 610000.014305115 2007 500000 2008 1210000.03814697 2009 1029999.97138977 2010 1220000.02861023 2011 2930000.0667572 2012 3099999.90463257 2013 3589999.91416931 2014 3619999.8855590797 2015 3230000.01907349 2016 3230000.01907349 2017 3799999.95231628 2018 5039999.96185303 2019 5309999.94277954 2020 5289999.96185303 2021 4449999.80926514 2022 4179999.8283386203