Year	Number
1996	72.0430145263672
1998	69.5187149047852
2000	69.1489334106445
2002	60.3174591064453
2003	58.7301597595215
2004	51.7241363525391
2005	47.3170738220215
2006	42.4390258789063
2007	39.3203887939453
2008	42.7184448242188
2009	37.7990417480469
2010	35.238094329834
2011	29.8578205108643
2012	25.5924167633057
2013	20.8530807495117
2014	19.7115383148193
2015	6.1904764175415
2016	8.09523773193359
2017	10.4761905670166
2018	9.0476188659668
2019	7.14285707473755
2020	8.5714282989502
2021	9.0476188659668
2022	8.01886749267578