Year Percent of GDP 1992 22.91 1993 10.187 1994 16.671 1995 15.892 1996 19.164 1997 21.332 1998 25.966 1999 22.402 2000 24.731 2001 28.19 2002 28.159 2003 30.173 2004 33.03 2005 35.142 2006 39.226 2007 41.536 2008 35.088 2009 21.982 2010 19.314 2011 25.169 2012 26.171 2013 24.284 2014 22.671 2015 22.208 2016 20.721 2017 22.267 2018 24.036 2019 24.749 2020 25.167 2021 25.655 2022 26.194 2023 26.743 2024 27.329