Year	Number
1996	27.4193553924561
1998	21.3903751373291
2000	14.8936166763306
2002	11.1111106872559
2003	8.99470901489258
2004	11.822660446167
2005	14.1463413238525
2006	20
2007	19.4174766540527
2008	28.6407775878906
2009	36.8421058654785
2010	40.9523811340332
2011	41.2322273254395
2012	32.7014236450195
2013	22.274881362915
2014	25.9615383148193
2015	25.238094329834
2016	36.1904754638672
2017	38.0952377319336
2018	29.0476188659668
2019	30.4761905670166
2020	29.5238094329834
2021	25.7142848968506
2022	21.698112487793