Year	Number
2004	48.2587051391602
2005	46.5686264038086
2006	40.4878044128418
2007	42.7184448242188
2008	45.6310691833496
2009	45.9330139160156
2010	44.4976081848145
2011	46.9194297790527
2012	47.3933639526367
2013	46.9194297790527
2014	32.6923065185547
2015	21.4285717010498
2016	16.1904754638672
2017	15.7142858505249
2018	36.6666679382324
2019	34.761905670166
2020	38.5714302062988
2021	31.9047622680664
2022	32.0754699707031