Year Number 1996 21.8085098266602 1998 33.5106391906738 2000 30.1587295532227 2002 21.6931209564209 2003 36.6834182739258 2004 35.9223289489746 2005 35.9223289489746 2006 42.512077331543 2007 40.5797119140625 2008 45.1923065185547 2009 51.1848335266113 2010 50.7108993530273 2011 49.2891006469727 2012 56.8720397949219 2013 47.8672981262207 2014 38.5714302062988 2015 40.476188659668 2016 37.6190490722656 2017 38.5714302062988 2018 37.2641525268555 2019 26.8867931365967 2020 25.943395614624 2021 34.4339637756348 2022 36.3207550048828