Year Percent of GDP (Units) 1995 13.981 1996 14.526 1997 14.348 1998 16.618 1999 16.736 2000 16.613 2001 17.557 2002 16.462 2003 18.525 2004 19.202 2005 18.869 2006 19.461 2007 19.584 2008 19.909 2009 20.349 2010 18.628 2011 19.070 2012 19.666 2013 19.905 2014 19.758 2015 19.738 2016 19.488 2017 19.638 2018 20.383 2019 22.551 2020 25.095 2021 25.739 2022 28.680 2023 24.893 2024 24.484 2025 24.315 2026 24.260 2027 24.201 2028 24.201 2029 24.211