Year Percent of GDP (Units) 1995 48.368 1996 53.271 1997 48.710 1998 45.851 1999 47.966 2000 52.772 2001 45.307 2002 45.447 2003 40.379 2004 37.920 2005 39.726 2006 38.821 2007 36.381 2008 36.994 2009 44.408 2010 42.140 2011 41.354 2012 41.109 2013 42.474 2014 43.257 2015 45.563 2016 42.546 2017 39.495 2018 39.670 2019 40.533 2020 44.751 2021 45.605 2022 42.282 2023 47.914 2024 46.963 2025 46.171 2026 44.848 2027 44.644 2028 44.601 2029 44.536