Year Percent of GDP (Units) 1992 37.356 1993 29.386 1994 17.324 1995 21.667 1996 21.409 1997 17.615 1998 11.626 1999 23.357 2000 32.721 2001 29.311 2002 25.315 2003 25.928 2004 28.131 2005 28.516 2006 27.957 2007 27.228 2008 29.150 2009 21.072 2010 24.788 2011 29.014 2012 27.806 2013 24.732 2014 25.198 2015 27.144 2016 25.006 2017 25.650 2018 28.916 2019 26.533 2020 25.833 2021 29.333 2022 33.245 2023 29.296 2024 29.454 2025 28.859 2026 28.467 2027 28.146 2028 27.643 2029 27.007