Year	Number
1996	5.85106372833252
1998	1.06382977962494
2000	0
2002	1.05820107460022
2003	0
2004	1.45631062984467
2005	3.39805817604065
2006	5.79710149765015
2007	8.69565200805664
2008	9.61538505554199
2009	14.6919431686401
2010	12.3222751617432
2011	13.7440757751465
2012	18.0094795227051
2013	19.4312801361084
2014	20.9523811340332
2015	17.1428565979004
2016	21.4285717010498
2017	17.1428565979004
2018	15.5660381317139
2019	17.4528293609619
2020	18.3962268829346
2021	17.9245281219482
2022	16.9811325073242