Year	Number
1996	21.1956520080566
1998	14.6739130020142
2000	14.6739130020142
2002	16.2162170410156
2003	16.2162170410156
2004	12.4378108978271
2005	11.764705657959
2006	14.7058820724487
2007	16.990291595459
2008	16.990291595459
2009	16.7464122772217
2010	12.9186601638794
2011	14.6919431686401
2012	11.3744077682495
2013	14.2180099487305
2014	16.3461532592773
2015	13.8095235824585
2016	12.380952835083
2017	11.9047622680664
2018	9.0476188659668
2019	8.5714282989502
2020	9.5238094329834
2021	8.09523773193359
2022	15.5660381317139