Year Percent of GDP (Units) 1996 50.666 1997 67.222 1998 79.031 1999 89.185 2000 96.477 2001 105.175 2002 118.610 2003 138.977 2004 149.310 2005 126.434 2006 136.943 2007 131.349 2008 116.552 2009 119.628 2010 125.683 2011 117.059 2012 111.817 2013 74.129 2014 48.206 2015 39.922 2016 33.914 2017 33.856 2018 27.841 2019 29.476 2020 46.365 2021 38.679 2022 38.859 2023 34.501 2024 33.040 2025 32.371 2026 32.907 2027 34.666 2028 37.437 2029 40.135