Year Number 1996 0.628802180290222 1998 0.639759063720703 2000 0.639512836933136 2002 0.810420453548431 2003 0.73251885175705 2004 0.27673327922821 2005 0.195848137140274 2006 0.454070419073105 2007 0.392457008361816 2008 0.478367477655411 2009 0.505319178104401 2010 0.496133357286453 2011 0.427274107933044 2012 0.395672678947449 2013 0.437806695699692 2014 0.591261208057404 2015 0.592993319034576 2016 0.664181649684906 2017 0.694656550884247 2018 0.516633987426758 2019 0.638392388820648 2020 0.647277474403381 2021 0.717866539955139 2022 0.709754884243011