Year Percent of GDP (Units) 1992 40.915 1993 26.849 1994 28.704 1995 23.319 1996 16.147 1997 15.599 1998 15.804 1999 17.776 2000 18.139 2001 26.876 2002 27.288 2003 25.704 2004 26.311 2005 30.970 2006 33.901 2007 35.527 2008 27.506 2009 29.415 2010 25.374 2011 22.998 2012 25.230 2013 24.570 2014 25.790 2015 27.908 2016 27.828 2017 26.352 2018 25.258 2019 27.628 2020 28.807 2021 26.533 2022 24.924 2023 25.862 2024 25.190 2025 24.408 2026 24.983 2027 24.488 2028 24.504 2029 24.604