Year % of GDP 1995 5.414842960303281 1996 7.876437895825256 1997 10.6237239017322 1998 10.01573047131678 1999 11.191278423624464 2000 11.401433039334115 2001 11.804674857656577 2002 11.621512875536482 2003 10.922338599502575 2004 15.102348258909032 2005 16.542608575927854 2006 18.57011290872305 2007 20.95528957619838 2008 24.22450445349648 2009 23.509396197042143 2010 21.1106596234593 2011 22.661404651519216 2012 23.088504140230132 2013 22.06259866840552 2014 22.053149233970114 2015 22.347748060669215 2016 23.042431537767076 2017 23.01354620222545 2018 22.04786882355534 2019 22.897277078389575 2020 21.180782903854265 2021 21.472893748764903 2022 22.902278342025802