Year current US$ 2005 43348526659.046 2006 49183305457.5225 2007 63404412802.1473 2008 71647936911.4195 2009 49526869255.6111 2010 51467774051.0872 2011 58554517175.0766 2012 52073349741.4441 2013 52489756011.974 2014 55590111788.437 2015 46786993122.3424 2016 54558556456.2784 2017 53211438053.0189 2018 59099126812.4612 2019 60903870737.7574 2020 57221657175.8431 2021 61650752442.9366