Year	Number
1996	45.9016380310059
1998	45.3551902770996
2000	44.8087425231934
2002	24.3243236541748
2003	25.4054050445557
2004	21.3930339813232
2005	23.0392150878906
2006	21.463415145874
2007	33.009708404541
2008	33.980583190918
2009	37.3205757141113
2010	39.2344512939453
2011	40.2843589782715
2012	37.9146919250488
2013	36.0189590454102
2014	25.480770111084
2015	25.238094329834
2016	21.9047622680664
2017	23.8095245361328
2018	20.4761905670166
2019	20.9523811340332
2020	19.5238094329834
2021	21.4285717010498
2022	20.7547168731689