Year	Number
1996	38.2513656616211
1998	30.0546455383301
2000	32.2404365539551
2002	23.2432441711426
2003	21.6216220855713
2004	12.93532371521
2005	12.2549018859863
2006	10.2439022064209
2007	10.1941747665405
2008	10.6796112060547
2009	14.3540668487549
2010	13.3971290588379
2011	14.6919431686401
2012	17.5355453491211
2013	15.1658763885498
2014	16.8269233703613
2015	17.619047164917
2016	20
2017	18.5714282989502
2018	20
2019	27.1428565979004
2020	38.0952377319336
2021	37.1428565979004
2022	41.5094337463379