Year Percent of GDP (Units) 1995 30.416 1996 32.444 1997 34.215 1998 34.382 1999 34.320 2000 34.970 2001 35.715 2002 37.422 2003 40.386 2004 38.637 2005 39.689 2006 39.127 2007 37.564 2008 38.218 2009 41.889 2010 41.696 2011 42.075 2012 41.894 2013 42.098 2014 40.316 2015 39.464 2016 37.286 2017 36.410 2018 42.612 2019 38.127 2020 44.225 2021 41.886 2022 38.807 2023 39.946 2024 40.934 2025 40.969 2026 40.973 2027 41.263 2028 41.658 2029 41.846