Year % of GDP 1998 143.9489995333932 1999 100.74413772420515 2000 62.148888866957606 2001 48.98361533517039 2002 41.352716864410695 2005 16.66086844779827 2006 9.891072860467464 2007 7.158430116584044 2008 6.4952874378899725 2009 8.697866335039189 2010 9.098105644731064 2011 8.641081944305819 2012 8.55140859340356 2013 9.06725564048848 2014 11.200461282728584 2015 13.540765776855817 2016 14.241739579354817 2017 16.325374115884465 2018 16.16857898532375 2019 17.27604843793764 2020 22.99202103696796 2021 20.866699219157123 2022 19.506237677809064