Year	Number
1996	58.152172088623
1998	51.6304359436035
2000	41.3043479919434
2002	36.2162170410156
2003	37.8378372192383
2004	29.8507461547852
2005	30.3921566009521
2006	37.2549018859863
2007	39.8058242797852
2008	37.3786392211914
2009	39.2344512939453
2010	39.7129173278809
2011	31.7535552978516
2012	38.8625602722168
2013	36.4928894042969
2014	31.730770111084
2015	23.8095245361328
2016	10.4761905670166
2017	10.4761905670166
2018	8.09523773193359
2019	7.61904764175415
2020	6.66666650772095
2021	3.80952382087708
2022	4.71698093414307