Year Percent of GDP (Units) 1992 16.298 1993 -1.497 1994 13.139 1995 16.815 1996 20.079 1997 25.593 1998 21.576 1999 19.866 2000 19.325 2001 20.497 2002 23.761 2003 27.225 2004 26.010 2005 26.076 2006 28.082 2007 28.140 2008 29.527 2009 24.005 2010 20.073 2011 18.733 2012 17.733 2013 18.265 2014 17.795 2015 19.316 2016 19.730 2017 20.673 2018 22.140 2019 21.931 2020 23.214 2021 22.046 2022 26.316 2023 22.163 2024 22.233 2025 22.591 2026 22.856 2027 23.535 2028 23.792 2029 24.123