Year	Number
1996	21.3114757537842
1998	27.8688526153564
2000	31.1475410461426
2002	16.7567558288574
2003	19.4594593048096
2004	13.4328355789185
2005	10.2941179275513
2006	14.6341466903687
2007	16.990291595459
2008	17.9611644744873
2009	20.0956935882568
2010	14.3540668487549
2011	15.1658763885498
2012	27.488151550293
2013	27.962085723877
2014	52.4038467407227
2015	47.1428565979004
2016	35.7142868041992
2017	32.3809509277344
2018	31.4285717010498
2019	33.8095245361328
2020	33.8095245361328
2021	34.761905670166
2022	28.7735843658447