Year	Number
1996	33.8797798156738
1998	26.7759571075439
2000	28.4153003692627
2002	20.5405406951904
2003	24.8648643493652
2004	22.8855724334717
2005	23.529411315918
2006	20.9756088256836
2007	16.5048542022705
2008	17.4757289886475
2009	18.1818180084229
2010	18.1818180084229
2011	19.9052124023438
2012	21.8009471893311
2013	22.748815536499
2014	19.7115383148193
2015	19.0476188659668
2016	23.8095245361328
2017	27.619047164917
2018	20
2019	22.8571434020996
2020	27.1428565979004
2021	17.619047164917
2022	13.6792449951172