Year	Number
1996	51.3661193847656
1998	56.8306007385254
2000	57.3770484924316
2002	49.1891899108887
2003	52.972972869873
2004	51.7412948608398
2005	51.9607849121094
2006	50.7317085266113
2007	49.5145645141602
2008	44.6601943969727
2009	43.0622024536133
2010	49.7607650756836
2011	49.7630348205566
2012	45.497631072998
2013	44.5497627258301
2014	44.711540222168
2015	37.1428565979004
2016	34.761905670166
2017	34.2857131958008
2018	25.238094329834
2019	20.4761905670166
2020	10.9523811340332
2021	10
2022	7.54716968536377