Year Percent of GDP (Units) 1992 18.316 1993 18.832 1994 25.037 1995 23.556 1996 23.744 1997 24.868 1998 25.144 1999 24.448 2000 24.787 2001 25.360 2002 25.446 2003 25.082 2004 25.590 2005 26.190 2006 28.270 2007 28.662 2008 27.303 2009 22.037 2010 21.219 2011 20.667 2012 19.637 2013 21.902 2014 24.514 2015 23.065 2016 23.264 2017 26.392 2018 27.447 2019 26.641 2020 27.462 2021 25.192 2022 23.489 2023 25.120 2024 24.907 2025 24.811 2026 24.851 2027 24.830 2028 24.928 2029 24.900