Year Percent of GDP (Units) 1995 31.894 1996 29.991 1997 27.243 1998 29.063 1999 27.580 2000 27.551 2001 27.294 2002 25.549 2003 24.005 2004 26.309 2005 27.459 2006 27.929 2007 27.805 2008 29.470 2009 24.545 2010 23.809 2011 25.103 2012 24.811 2013 24.487 2014 26.191 2015 28.432 2016 27.800 2017 27.919 2018 27.642 2019 27.938 2020 28.145 2021 27.467 2022 26.036 2023 30.251 2024 28.106 2025 27.881 2026 27.719 2027 27.965 2028 28.310 2029 28.449