Year	Number
1996	17.2043018341064
1998	16.0427799224854
2000	36.7021293640137
2002	37.037036895752
2003	28.0423278808594
2004	17.7339897155762
2005	21.463415145874
2006	41.4634132385254
2007	54.3689308166504
2008	37.8640785217285
2009	47.8468894958496
2010	47.6190490722656
2011	40.7582931518555
2012	44.0758285522461
2013	37.9146919250488
2014	35.0961532592773
2015	40.9523811340332
2016	35.7142868041992
2017	40.476188659668
2018	28.0952377319336
2019	27.1428565979004
2020	27.1428565979004
2021	27.619047164917
2022	26.4150943756104