Year Percent of GDP (Units) 1995 9.775 1996 9.852 1997 11.186 1998 13.159 1999 14.582 2000 13.582 2001 13.760 2002 13.148 2003 14.367 2004 12.864 2005 13.245 2006 14.167 2007 13.906 2008 13.260 2009 14.100 2010 14.468 2011 14.488 2012 14.151 2013 13.994 2014 13.596 2015 12.582 2016 12.566 2017 12.778 2018 13.187 2019 13.441 2020 15.586 2021 13.532 2022 14.363 2023 14.044 2024 14.424 2025 15.288 2026 15.538 2027 15.678 2028 15.274 2029 15.000