Year	Number
1996	54
1998	47.7611923217773
2000	50.2487564086914
2002	43.2835807800293
2003	40.7960205078125
2004	38.461540222168
2005	35.0961532592773
2006	27.884614944458
2007	27.4038467407227
2008	28.8461532592773
2009	28.9099521636963
2010	28.9099521636963
2011	28.6384983062744
2012	24.8826293945313
2013	24.4131450653076
2014	24.630542755127
2015	23.645320892334
2016	22.660099029541
2017	23.1527099609375
2018	23.7864074707031
2019	22.2222213745117
2020	23.6714973449707
2021	23.1884059906006
2022	19.8067626953125