Year Percent of GDP (Units) 1995 55.230 1996 51.084 1997 49.601 1998 50.794 1999 49.021 2000 47.347 2001 47.252 2002 50.995 2003 49.122 2004 48.722 2005 49.319 2006 51.358 2007 49.861 2008 48.745 2009 50.559 2010 48.813 2011 49.061 2012 49.116 2013 50.062 2014 50.046 2015 50.380 2016 46.798 2017 46.718 2018 46.096 2019 46.085 2020 51.421 2021 48.394 2022 48.839 2023 47.420 2024 47.480 2025 46.440 2026 45.566 2027 44.888 2028 45.323 2029 45.222