Year	Number
1996	36.559139251709
1998	32.6203193664551
2000	36.1702117919922
2002	23.8095245361328
2003	39.6825408935547
2004	37.4384231567383
2005	47.8048782348633
2006	49.2682914733887
2007	52.9126205444336
2008	53.3980598449707
2009	53.1100463867188
2010	52.3809509277344
2011	52.6066360473633
2012	55.4502372741699
2013	54.502368927002
2014	44.711540222168
2015	42.8571434020996
2016	41.4285697937012
2017	42.3809509277344
2018	32.8571434020996
2019	32.3809509277344
2020	28.5714282989502
2021	27.619047164917
2022	24.5283012390137