Year	Number
1996	27.3224048614502
1998	36.6120223999023
2000	31.6939888000488
2002	27.5675678253174
2003	23.2432441711426
2004	18.4079608917236
2005	18.6274509429932
2006	22.4390239715576
2007	26.6990299224854
2008	25.7281551361084
2009	23.4449768066406
2010	25.8373203277588
2011	25.1184825897217
2012	23.6966819763184
2013	23.6966819763184
2014	21.634614944458
2015	23.8095245361328
2016	26.1904754638672
2017	22.8571434020996
2018	22.380952835083
2019	24.761905670166
2020	20.4761905670166
2021	27.619047164917
2022	23.1132068634033