Year	Number
1996	36.6834182739258
1998	36.5
2000	33.3333320617676
2002	34.3283576965332
2003	44.7761192321777
2004	28.365385055542
2005	28.7081336975098
2006	30.6220092773438
2007	34.4497604370117
2008	29.8076915740967
2009	27.488151550293
2010	25.1184825897217
2011	25.3521118164063
2012	23.0046939849854
2013	19.2488269805908
2014	15.865385055542
2015	13.3333330154419
2016	11.9047622680664
2017	25.238094329834
2018	25.7142848968506
2019	26.1904754638672
2020	29.0476188659668
2021	27.619047164917
2022	24.5283012390137