Year % of GDP 1995 9.879519655752773 1996 10.942402387194347 1997 9.421899119082342 1998 7.662128669529321 1999 6.382887326935513 2000 5.58605077769058 2001 4.874298635805819 2002 4.775131239227239 2003 4.4228539154003395 2004 4.1728968841311005 2005 4.328519222877987 2006 3.864244605862873 2007 3.475410667852323 2008 3.283897121215336 2009 2.5364710545017726 2010 3.0237927150382893 2011 3.4901942602217413 2012 3.9794567898396664 2013 3.5449208652590514 2014 3.423190601342855 2015 3.420675120331129 2016 3.1087613527659217 2017 3.507511549556954 2018 2.8796034100764434 2019 3.1001859509027523 2020 3.5132696191852406 2021 3.396305403791242 2022 3.9721212256198744 2023 2.986257959322997