Year	Number
1996	1.63934421539307
1998	2.7322404384613
2000	2.7322404384613
2002	8.64864826202393
2003	29.1891899108887
2004	36.3184089660645
2005	21.5686283111572
2006	14.1463413238525
2007	16.990291595459
2008	13.1067962646484
2009	12.4401912689209
2010	12.9186601638794
2011	13.2701425552368
2012	15.1658763885498
2013	14.6919431686401
2014	16.3461532592773
2015	14.7619047164917
2016	18.5714282989502
2017	15.2380952835083
2018	11.9047622680664
2019	12.380952835083
2020	11.4285717010498
2021	11.4285717010498
2022	8.49056625366211