Year	Number
1996	36.4130439758301
1998	35.8695640563965
2000	41.3043479919434
2002	45.4054069519043
2003	49.1891899108887
2004	48.756217956543
2005	51.470588684082
2006	50
2007	50
2008	46.6019401550293
2009	28.2296657562256
2010	23.4449768066406
2011	21.8009471893311
2012	19.4312801361084
2013	24.1706161499023
2014	17.3076915740967
2015	19.5238094329834
2016	20
2017	16.1904754638672
2018	13.8095235824585
2019	11.9047622680664
2020	14.7619047164917
2021	21.9047622680664
2022	25.943395614624