Year Number 2002 1.62162160873413 2003 2.16216206550598 2004 3.48258709907532 2005 5.88235282897949 2006 1.96078431606293 2007 1.45631062984467 2008 2.42718458175659 2009 5.26315784454346 2010 5.74162673950195 2011 7.10900497436523 2012 7.5829381942749 2013 8.05687236785889 2014 8.17307662963867 2015 5.7142858505249 2016 6.1904764175415 2017 10.4761905670166 2018 9.5238094329834 2019 9.5238094329834 2020 10.4761905670166 2021 10 2022 20.2830181121826