Year current US$ 2005 14229999.5422363 2006 17559999.4659424 2007 21420000.0762939 2008 25010000.2288818 2009 21520000.4577637 2010 18889999.3896484 2011 19000000 2012 19069999.6948242 2013 20620000.8392334 2014 20219999.3133545 2015 25110000.6103516 2016 27809999.4659424 2017 24909999.8474121 2018 29290000.915527303 2019 31010000.2288818 2020 30180002.2125244 2021 46080001.8310547 2022 52550000.97118314