Year % of GDP 1998 1.6210864013262833 1999 3.772320186204296 2000 2.6235914600339423 2001 2.0428042593433875 2002 3.979797534413333 2003 4.492168289746514 2004 8.758860397363359 2005 5.558444017450431 2006 6.575773589320589 2007 11.673764190393857 2008 5.257486278266784 2009 0.7863711823536086 2010 2.584024491424704 2011 2.529527380581761 2012 2.275398813061557 2013 1.7233793824677848 2014 2.9359026226906435 2015 2.335293029497911 2016 1.8297569748452456 2017 2.7797591904199592 2018 2.9378135841546333 2019 2.1866137754207506 2020 2.3893904835565123 2021 3.1027723236773435 2022 3.251657559705459