Year Percent of GDP (Units) 1994 17.311 1995 19.280 1996 21.333 1997 22.066 1998 20.259 1999 21.120 2000 22.526 2001 23.683 2002 33.328 2003 31.774 2004 30.261 2005 30.833 2006 29.518 2007 31.146 2008 32.312 2009 33.336 2010 33.479 2011 31.587 2012 34.556 2013 35.170 2014 33.084 2015 34.954 2016 33.619 2017 32.864 2018 29.277 2019 25.422 2020 34.952 2021 32.857 2022 30.953 2023 28.625 2024 28.967 2025 27.703 2026 27.301 2027 26.930 2028 26.780 2029 26.611