Year Percent of GDP (Units) 1991 46.468 1992 47.317 1993 48.230 1994 48.277 1995 55.117 1996 49.419 1997 48.568 1998 48.145 1999 48.212 2000 47.758 2001 47.416 2002 47.872 2003 48.304 2004 46.791 2005 46.821 2006 45.235 2007 43.398 2008 44.200 2009 48.200 2010 48.142 2011 45.238 2012 44.918 2013 44.944 2014 44.303 2015 44.141 2016 44.354 2017 44.175 2018 44.321 2019 45.003 2020 50.462 2021 50.937 2022 49.477 2023 48.267 2024 47.778 2025 47.765 2026 47.597 2027 47.625 2028 47.622 2029 47.781