Year	Number
1996	30.6451606750488
1998	34.2245979309082
2000	45.2127647399902
2002	37.037036895752
2003	33.862434387207
2004	22.1674880981445
2005	22.9268283843994
2006	26.8292675018311
2007	21.8446598052979
2008	21.8446598052979
2009	21.0526313781738
2010	22.380952835083
2011	22.274881362915
2012	17.0616111755371
2013	15.6398105621338
2014	8.65384578704834
2015	10.4761905670166
2016	10
2017	8.09523773193359
2018	9.0476188659668
2019	10.9523811340332
2020	15.2380952835083
2021	17.619047164917
2022	20.7547168731689