Year % of GDP 1995 17.416391352228597 1996 19.382399044216562 1997 22.127245102204057 1998 23.919993806652247 1999 24.236283041525212 2000 23.69298968714052 2001 20.440970996023278 2002 18.40795652377329 2003 18.14219880257616 2004 18.331974051834173 2005 18.893016869756597 2006 20.404963013041513 2007 22.46519602394258 2008 23.1058416843566 2009 21.443486816931177 2010 19.722553765839727 2011 20.493086884293092 2012 19.58221386101533 2013 18.97227576273245 2014 20.12728808057619 2015 20.419456304827825 2016 18.470163851273874 2017 17.56985344922367 2018 18.735286897850276 2019 18.91708601122486 2020 18.31266319654768 2021 16.81122121292045 2022 16.426737626341634 2023 17.760518125811366