Year	Number
1996	48
1998	54.2288551330566
2000	49.7512435913086
2002	35.3233833312988
2003	35.8208961486816
2004	29.3269233703613
2005	27.884614944458
2006	30.2884616851807
2007	26.4423084259033
2008	26.4423084259033
2009	24.6445503234863
2010	24.1706161499023
2011	20.6572761535645
2012	22.0657272338867
2013	22.0657272338867
2014	19.7044334411621
2015	19.7044334411621
2016	17.2413787841797
2017	14.2857141494751
2018	10.1941747665405
2019	9.66183567047119
2020	7.24637699127197
2021	5.79710149765015
2022	6.7632851600647