Year	Number
1996	64.4808731079102
1998	66.6666641235352
2000	65.0273208618164
2002	62.7027015686035
2003	63.7837829589844
2004	61.1940307617188
2005	58.8235282897949
2006	52.6829261779785
2007	49.029125213623
2008	45.1456298828125
2009	46.4114837646484
2010	45.4545440673828
2011	45.971565246582
2012	49.7630348205566
2013	49.7630348205566
2014	30.769229888916
2015	30.4761905670166
2016	30
2017	27.1428565979004
2018	30.4761905670166
2019	29.0476188659668
2020	30
2021	32.8571434020996
2022	36.3207550048828