Year	Number
1996	13.978494644165
1998	17.6470584869385
2000	35.638298034668
2002	37.5661392211914
2003	36.5079383850098
2004	23.1527099609375
2005	31.2195129394531
2006	14.6341466903687
2007	9.70873832702637
2008	10.1941747665405
2009	13.3971290588379
2010	20
2011	19.9052124023438
2012	29.8578205108643
2013	32.2274894714355
2014	28.8461532592773
2015	26.1904754638672
2016	25.7142848968506
2017	19.5238094329834
2018	20.9523811340332
2019	20
2020	20.4761905670166
2021	20.9523811340332
2022	16.0377349853516