Year Percent of GDP (Units) 1997 25.930 1998 39.486 1999 41.959 2000 44.303 2001 52.806 2002 65.723 2003 61.327 2004 58.211 2005 44.674 2006 42.305 2007 33.019 2008 28.926 2009 18.865 2010 22.948 2011 18.344 2012 15.221 2013 13.473 2014 10.463 2015 8.961 2016 7.066 2017 8.466 2018 7.879 2019 7.870 2020 13.516 2021 15.936 2022 17.252 2023 17.967 2024 19.795 2025 21.059 2026 22.033 2027 23.012 2028 24.017 2029 25.166