Year Percent of GDP (Units) 1995 77.901 1996 72.831 1997 65.185 1998 73.335 1999 74.042 2000 68.352 2001 65.221 2002 60.163 2003 68.087 2004 72.177 2005 60.499 2006 61.410 2007 60.373 2008 60.469 2009 64.871 2010 68.672 2011 66.241 2012 66.026 2013 60.390 2014 55.151 2015 56.826 2016 63.012 2017 65.329 2018 56.936 2019 57.413 2020 60.711 2021 66.811 2022 59.250 2023 57.857 2024 59.972 2025 65.777 2026 67.024 2027 66.960 2028 66.819 2029 66.370