Year current US$ 2000 1016.90206272 2001 1127.72361577 2002 1320.9253014 2003 1576.10570038 2004 1732.26576365 2005 1761.64548216 2006 1736.13404467 2007 1890.15055405 2008 2250.53777994 2009 2346.02511506 2010 2587.47076679 2011 3158.71900402 2012 3103.39056996 2013 3083.72633417 2014 3160.83626579 2015 3040.12483854 2016 3049.60343759 2017 3086.67640792 2018 3150.17917595 2019 3144.26801861 2020 3621.65460945 2021 3946.34766303