Year	Number
1996	49.7267761230469
1998	39.8907089233398
2000	37.7049179077148
2002	47.027027130127
2003	45.9459457397461
2004	46.766170501709
2005	50.4901962280273
2006	53.1707305908203
2007	45.6310691833496
2008	41.7475738525391
2009	50.2392349243164
2010	46.8899536132813
2011	42.6540298461914
2012	40.7582931518555
2013	39.3364944458008
2014	30.2884616851807
2015	35.238094329834
2016	32.3809509277344
2017	30.4761905670166
2018	34.761905670166
2019	36.1904754638672
2020	29.5238094329834
2021	33.3333320617676
2022	41.5094337463379