Year	Number
1996	14
1998	1.49253726005554
2000	1.99004971981049
2002	12.93532371521
2003	15.9203977584839
2004	11.057692527771
2005	8.65384578704834
2006	8.17307662963867
2007	8.17307662963867
2008	9.61538505554199
2009	10.4265403747559
2010	12.7962083816528
2011	11.7370891571045
2012	8.92018795013428
2013	12.2065725326538
2014	10.837438583374
2015	13.3004922866821
2016	11.3300495147705
2017	12.3152713775635
2018	10.6796112060547
2019	7.24637699127197
2020	7.24637699127197
2021	10.1449279785156
2022	10.1449279785156