Year Percent of GDP (Units) 1995 54.375 1996 44.240 1997 47.808 1998 42.700 1999 36.407 2000 27.525 2001 24.167 2002 24.553 2003 25.136 2004 25.834 2005 25.123 2006 25.504 2007 26.137 2008 29.499 2009 31.378 2010 29.466 2011 28.745 2012 27.378 2013 28.028 2014 28.573 2015 26.151 2016 24.714 2017 22.395 2018 20.064 2019 19.794 2020 21.525 2021 17.027 2022 14.573 2023 12.422 2024 10.649 2025 10.632 2026 10.706 2027 11.026 2028 11.322 2029 12.103