Year % of GDP 1995 22.28419782946253 1996 21.405183013051126 1997 21.51727314511857 1998 21.693198825658904 1999 20.742793564203723 2000 20.60411502580606 2001 20.241932463511215 2002 19.58393319583992 2003 19.780469748835383 2004 20.95829589855939 2005 21.42292133247026 2006 22.517432050594287 2007 23.958984664558105 2008 23.216166635335277 2009 22.12882688185769 2010 22.10944102290544 2011 23.38963221800812 2012 23.1360848635435 2013 23.809446144941752 2014 24.69992627202055 2015 25.929383359511377 2016 25.58727673066571 2017 25.397850608834748 2018 25.499008719948403 2019 25.766303182948153 2020 25.1337368554628 2021 25.789829918166728 2022 24.88255129280782 2023 25.290599793663688