Year Percent of GDP (Units) 1995 29.703 1996 29.488 1997 29.394 1998 30.530 1999 30.266 2000 32.730 2001 33.608 2002 33.291 2003 34.479 2004 34.926 2005 37.464 2006 38.085 2007 40.792 2008 39.084 2009 36.455 2010 37.012 2011 36.425 2012 36.343 2013 36.938 2014 40.082 2015 39.532 2016 37.543 2017 38.304 2018 38.994 2019 39.382 2020 38.489 2021 39.952 2022 41.245 2023 42.891 2024 43.435 2025 43.412 2026 43.291 2027 42.654 2028 42.654 2029 42.654