Year % of GDP 1991 14.826692713559373 1992 13.07629840638523 1993 6.445527632205848 1994 10.668164194266431 1995 7.957194415277416 1996 8.09803193403836 1997 4.743740660615199 1998 8.175110876022078 1999 7.016997184817384 2000 6.859055805337948 2001 9.143142626839653 2002 14.410405057705006 2003 22.305628618637062 2004 25.552927222226135 2005 27.55066504824704 2006 30.11903322678991 2007 41.57649112317678 2008 39.90201124823579 2009 40.299728019773355 2010 34.191265820963 2011 43.49346733048144 2012 43.72176098700527 2013 59.874857925990334 2014 57.67060944728437 2015 52.92087918406933 2016 54.08496346764689 2017 50.41645209845477 2018 53.44577237509657 2019 47.929451169587814 2020 45.03986496542276 2021 47.22792399796717 2022 40.85985398081739 2023 39.43998618593144