Year Percent of GDP (Units) 1998 -11.725 1999 -3.235 2000 4.475 2001 5.486 2002 8.405 2003 10.611 2004 13.159 2005 17.208 2006 19.659 2007 15.330 2008 11.062 2009 14.399 2010 27.457 2011 26.440 2012 29.923 2013 30.760 2014 27.588 2015 30.079 2016 29.268 2017 27.707 2018 28.303 2019 29.458 2020 28.757 2021 31.989 2022 27.682 2023 26.141 2024 26.005 2025 25.939 2026 26.461 2027 26.386 2028 27.269 2029 28.037