Year Percent of GDP (Units) 1995 53.102 1996 45.147 1997 45.371 1998 46.217 1999 47.019 2000 47.534 2001 48.712 2002 47.261 2003 47.155 2004 46.627 2005 46.394 2006 45.539 2007 43.410 2008 45.052 2009 49.361 2010 50.176 2011 50.857 2012 49.355 2013 60.267 2014 50.842 2015 48.711 2016 46.163 2017 44.070 2018 43.469 2019 43.377 2020 51.354 2021 49.461 2022 47.036 2023 47.372 2024 47.159 2025 46.208 2026 45.994 2027 45.946 2028 45.778 2029 45.791