Year Percent of GDP (Units) 1990 14.470 1991 11.594 1992 12.232 1993 12.294 1994 11.960 1995 12.718 1996 12.965 1997 12.866 1998 13.062 1999 13.831 2000 13.186 2001 13.810 2002 13.558 2003 14.135 2004 13.591 2005 13.797 2006 14.108 2007 15.154 2008 15.362 2009 13.408 2010 13.086 2011 13.270 2012 13.128 2013 13.273 2014 12.946 2015 13.237 2016 13.662 2017 13.278 2018 13.235 2019 15.002 2020 13.912 2021 15.687 2022 16.383 2023 15.269 2024 15.286 2025 15.333 2026 15.405 2027 15.389 2028 15.378 2029 15.378