Year	Number
1996	11.4130430221558
1998	15.7608699798584
2000	18.4782600402832
2002	24.8648643493652
2003	30.2702693939209
2004	27.8606967926025
2005	29.9019603729248
2006	32.8431358337402
2007	34.4660186767578
2008	41.7475738525391
2009	41.6267929077148
2010	38.2775115966797
2011	37.4407577514648
2012	33.1753540039063
2013	36.4928894042969
2014	43.75
2015	40
2016	39.0476188659668
2017	38.0952377319336
2018	39.523811340332
2019	44.2857131958008
2020	39.0476188659668
2021	50.476188659668
2022	48.113208770752