Year	Number
1996	17.7419357299805
1998	30.4812831878662
2000	22.8723411560059
2002	15.8730154037476
2003	22.2222213745117
2004	13.3004922866821
2005	16.5853652954102
2006	22.4390239715576
2007	19.9029121398926
2008	21.8446598052979
2009	21.0526313781738
2010	20.4761905670166
2011	20.3791465759277
2012	28.9099521636963
2013	32.2274894714355
2014	39.4230766296387
2015	36.1904754638672
2016	38.0952377319336
2017	40.9523811340332
2018	41.4285697937012
2019	47.1428565979004
2020	40.476188659668
2021	33.3333320617676
2022	21.2264156341553