Year	Number
1996	8.5
1998	11.4427862167358
2000	48.2587051391602
2002	43.2835807800293
2003	43.2835807800293
2004	42.3076934814453
2005	39.9038467407227
2006	36.0576934814453
2007	35.0961532592773
2008	33.6538467407227
2009	28.4360198974609
2010	29.3838863372803
2011	38.9671363830566
2012	39.4366188049316
2013	38.0281677246094
2014	40.8866996765137
2015	39.9014778137207
2016	33.0049247741699
2017	33.0049247741699
2018	30.5825233459473
2019	29.9516906738281
2020	33.8164253234863
2021	34.7826080322266
2022	36.2318840026855