Year % of GDP 1992 2.20338983050847 1993 2.29664433319049 1995 4.05931190833614 1996 3.28186700423013 1997 3.9093985598058505 1998 3.52809600318196 1999 3.69737423084246 2000 3.56002487253697 2001 3.1272493853097503 2002 2.69771474886414 2003 2.72837221377968 2004 2.74199670493715 2005 2.87193136291811 2006 2.94761315625864 2007 3.0425747012796602 2008 3.3955793627065702 2009 4.15704990783508 2010 4.26564605593771 2011 3.85394644115574 2012 3.58376691873744 2013 3.9972445573048403 2014 3.94337826474581 2015 4.23922578573229 2016 4.09034921699325 2017 3.84973057654684 2018 4.11988615256896 2019 4.78770584078564 2020 4.98254372367497 2021 4.47078156298276 2022 4.3171066723051705