Year Percent of GDP (Units) 2000 213.781 2001 100.618 2002 71.656 2003 67.630 2004 59.133 2005 51.312 2006 37.972 2007 31.204 2008 30.556 2009 33.925 2010 39.766 2011 43.709 2012 53.869 2013 56.406 2014 66.242 2015 69.854 2016 67.426 2017 57.500 2018 53.305 2019 51.711 2020 56.888 2021 56.240 2022 53.497 2023 48.912 2024 49.110 2025 48.294 2026 47.117 2027 47.105 2028 47.185 2029 46.084