Year	Number
1996	59
1998	56.7164192199707
2000	52.7363166809082
2002	44.2786064147949
2003	40.7960205078125
2004	35.5769233703613
2005	37.980770111084
2006	37.5
2007	34.6153831481934
2008	39.4230766296387
2009	44.5497627258301
2010	45.497631072998
2011	44.6009407043457
2012	41.3145523071289
2013	41.3145523071289
2014	38.9162559509277
2015	35.9605903625488
2016	34.4827575683594
2017	33.9901466369629
2018	30.5825233459473
2019	30.917875289917
2020	32.3671493530273
2021	32.8502426147461
2022	32.8502426147461