Year	Number
1996	4
1998	10.945273399353
2000	9.45273590087891
2002	19.9004974365234
2003	25.3731346130371
2004	19.230770111084
2005	8.65384578704834
2006	16.8269233703613
2007	15.384614944458
2008	15.865385055542
2009	13.2701425552368
2010	12.3222751617432
2011	8.45070457458496
2012	6.1032862663269
2013	6.57277011871338
2014	6.40394067764282
2015	4.43349742889404
2016	7.88177347183228
2017	23.645320892334
2018	32.5242729187012
2019	32.8502426147461
2020	34.7826080322266
2021	36.2318840026855
2022	38.6473426818848