Year	Number
1996	53.7688446044922
1998	52.5
2000	39.3034820556641
2002	39.8009948730469
2003	35.8208961486816
2004	32.6923065185547
2005	43.0622024536133
2006	42.5837326049805
2007	39.7129173278809
2008	35.5769233703613
2009	34.5971565246582
2010	35.0710906982422
2011	38.0281677246094
2012	39.4366188049316
2013	41.3145523071289
2014	42.3076934814453
2015	40
2016	36.1904754638672
2017	32.3809509277344
2018	31.9047622680664
2019	29.5238094329834
2020	28.0952377319336
2021	26.1904754638672
2022	33.4905662536621