Year	Number
1996	0.388865143060684
1998	0.360765397548676
2000	0.309702605009079
2002	0.355229288339615
2003	0.335184574127197
2004	0.316238701343536
2005	0.328990906476974
2006	0.344787657260895
2007	0.339864432811737
2008	0.324015617370605
2009	0.353580385446548
2010	0.365783989429474
2011	0.356751173734665
2012	0.348965555429459
2013	0.340912193059921
2014	0.473540753126144
2015	0.348503172397614
2016	0.309969574213028
2017	0.297954767942429
2018	0.317118674516678
2019	0.323601931333542
2020	0.337146520614624
2021	0.32666015625
2022	0.3149733543396