Year	Number
1996	49.7267761230469
1998	55.7377052307129
2000	47.5409851074219
2002	47.027027130127
2003	48.1081085205078
2004	39.8009948730469
2005	38.235294342041
2006	40.9756088256836
2007	45.1456298828125
2008	45.6310691833496
2009	43.0622024536133
2010	41.6267929077148
2011	42.1800956726074
2012	40.7582931518555
2013	41.7061614990234
2014	37.980770111084
2015	36.6666679382324
2016	40
2017	39.523811340332
2018	38.5714302062988
2019	37.6190490722656
2020	39.0476188659668
2021	37.1428565979004
2022	33.4905662536621