Year	Number
1996	4.25531911849976
1998	4.25531911849976
2000	6.34920644760132
2002	5.8201060295105
2003	17.0854263305664
2004	14.5631065368652
2005	17.9611644744873
2006	25.6038646697998
2007	32.3671493530273
2008	33.1730766296387
2009	27.962085723877
2010	36.0189590454102
2011	39.8104248046875
2012	38.3886260986328
2013	42.1800956726074
2014	35.238094329834
2015	45.7142868041992
2016	44.761905670166
2017	49.523811340332
2018	52.3584899902344
2019	49.5283012390137
2020	49.5283012390137
2021	50.4716987609863
2022	47.6415100097656