Year	Number
2002	26.4550266265869
2003	24.8677253723145
2004	22.1674880981445
2005	17.5609760284424
2006	18.0487804412842
2007	16.019416809082
2008	15.5339803695679
2009	11.4832534790039
2010	13.8095235824585
2011	11.8483409881592
2012	12.7962083816528
2013	15.1658763885498
2014	20.1923084259033
2015	18.5714282989502
2016	16.6666660308838
2017	16.1904754638672
2018	21.9047622680664
2019	26.1904754638672
2020	28.0952377319336
2021	37.1428565979004
2022	29.7169818878174