Year	Number
1996	26.0638294219971
1998	29.2553195953369
2000	23.280424118042
2002	13.2275133132935
2003	12.5628137588501
2004	9.22330093383789
2005	13.5922327041626
2006	13.5265703201294
2007	12.5603866577148
2008	11.5384616851807
2009	12.3222751617432
2010	12.3222751617432
2011	15.6398105621338
2012	17.5355453491211
2013	16.5876770019531
2014	18.0952377319336
2015	16.1904754638672
2016	13.8095235824585
2017	10.9523811340332
2018	9.43396186828613
2019	8.49056625366211
2020	8.49056625366211
2021	9.43396186828613
2022	12.2641506195068