Year	Number
1996	30.9782600402832
1998	41.847827911377
2000	35.3260879516602
2002	36.7567558288574
2003	37.2972984313965
2004	43.2835807800293
2005	38.235294342041
2006	37.7450981140137
2007	35.4368934631348
2008	38.3495140075684
2009	35.8851661682129
2010	42.1052627563477
2011	39.3364944458008
2012	41.7061614990234
2013	42.6540298461914
2014	37.019229888916
2015	38.5714302062988
2016	31.9047622680664
2017	27.1428565979004
2018	24.761905670166
2019	26.1904754638672
2020	27.619047164917
2021	19.5238094329834
2022	18.3962268829346