Year	Number
1996	31.1827964782715
1998	32.6203193664551
2000	32.4468078613281
2002	9.5238094329834
2003	5.8201060295105
2004	13.7931032180786
2005	15.6097564697266
2006	17.0731716156006
2007	18.4466018676758
2008	18.4466018676758
2009	21.5311012268066
2010	19.0476188659668
2011	17.5355453491211
2012	17.0616111755371
2013	21.3270149230957
2014	15.384614944458
2015	14.7619047164917
2016	12.380952835083
2017	14.2857141494751
2018	13.3333330154419
2019	12.380952835083
2020	14.7619047164917
2021	11.9047622680664
2022	11.3207550048828