Year	Number
1996	42.7135696411133
1998	44
2000	39.8009948730469
2002	40.2985076904297
2003	39.8009948730469
2004	33.1730766296387
2005	28.2296657562256
2006	23.9234447479248
2007	22.9665069580078
2008	17.3076915740967
2009	13.7440757751465
2010	14.6919431686401
2011	16.9014091491699
2012	15.962441444397
2013	15.023473739624
2014	12.0192308425903
2015	10.4761905670166
2016	9.5238094329834
2017	9.5238094329834
2018	9.5238094329834
2019	10
2020	9.5238094329834
2021	11.4285717010498
2022	9.43396186828613