Year Percent of GDP (Units) 1995 12.491 1996 10.878 1997 12.899 1998 13.632 1999 14.964 2000 13.503 2001 13.732 2002 14.449 2003 14.036 2004 16.071 2005 15.551 2006 15.197 2007 17.397 2008 16.875 2009 17.688 2010 14.295 2011 15.329 2012 16.641 2013 20.448 2014 23.639 2015 24.238 2016 19.362 2017 19.509 2018 21.158 2019 21.562 2020 22.366 2021 24.260 2022 21.588 2023 15.977 2024 19.522 2025 19.927 2026 20.243 2027 20.756 2028 20.637 2029 20.789