Year	Number
1996	53.5
1998	51.243782043457
2000	50.2487564086914
2002	44.7761192321777
2003	41.7910461425781
2004	36.0576934814453
2005	38.9423065185547
2006	46.6346168518066
2007	50
2008	48.5576934814453
2009	47.3933639526367
2010	48.8151664733887
2011	47.8873252868652
2012	46.478874206543
2013	47.8873252868652
2014	49.7536964416504
2015	49.2610855102539
2016	50.7389144897461
2017	51.7241363525391
2018	50
2019	50.2415466308594
2020	47.3429946899414
2021	47.8260879516602
2022	46.8599052429199