Year	Number
1996	48.924732208252
1998	42.2459907531738
2000	35.1063842773438
2002	43.3862419128418
2003	47.0899467468262
2004	43.8423652648926
2005	49.2682914733887
2006	45.8536567687988
2007	43.6893196105957
2008	42.2330093383789
2009	43.0622024536133
2010	46.1904754638672
2011	46.445499420166
2012	46.9194297790527
2013	50.7108993530273
2014	48.0769233703613
2015	42.3809509277344
2016	37.1428565979004
2017	36.1904754638672
2018	30.9523811340332
2019	29.0476188659668
2020	28.5714282989502
2021	28.0952377319336
2022	25.943395614624