Year	Number
1996	5.97826099395752
1998	8.15217399597168
2000	13.043478012085
2002	7.56756734848022
2003	15.1351346969604
2004	13.4328355789185
2005	12.7450981140137
2006	13.7254905700684
2007	13.5922327041626
2008	16.5048542022705
2009	14.8325357437134
2010	18.1818180084229
2011	18.9573459625244
2012	17.0616111755371
2013	15.1658763885498
2014	15.384614944458
2015	12.8571424484253
2016	10.9523811340332
2017	11.9047622680664
2018	11.4285717010498
2019	11.4285717010498
2020	11.4285717010498
2021	11.4285717010498
2022	11.3207550048828