Year Percent of GDP (Units) 1990 70.476 1991 59.138 1992 67.032 1993 74.701 1994 69.290 1995 72.220 1996 65.335 1997 67.956 1998 64.520 1999 63.363 2000 64.860 2001 60.435 2002 59.372 2003 56.929 2004 54.431 2005 54.767 2006 50.642 2007 47.066 2008 41.991 2009 42.622 2010 45.276 2011 48.555 2012 52.282 2013 57.076 2014 58.564 2015 58.394 2016 60.076 2017 60.258 2018 60.464 2019 60.270 2020 72.245 2021 69.450 2022 71.555 2023 70.589 2024 70.384 2025 69.439 2026 68.246 2027 67.483 2028 66.816 2029 66.139