Year % of GDP 1995 18.33629389835388 1996 18.16805584657219 1997 18.39943061514537 1998 18.15923392189449 1999 17.307092307463737 2000 17.535974450066387 2001 17.040542130456476 2002 16.79458705191727 2003 16.200237410926448 2004 16.089936079040577 2005 15.870945975584897 2006 15.018537512513397 2007 15.060318277021434 2008 13.992740724693675 2009 12.918041473962747 2010 13.338598518863657 2011 12.929059350295425 2012 12.624208680682603 2013 12.562639991855018 2014 12.56468619487731 2015 12.693333883687455 2016 12.356944075977486 2017 12.429117530812823 2018 12.173677341719653 2019 12.34546442877252 2020 12.262689149493895 2021 12.043883689602747 2022 12.643263780740174 2023 11.875582457911243