Year	Number
1996	43.0851058959961
1998	47.3404273986816
2000	40.7407417297363
2002	50.2645492553711
2003	37.6884422302246
2004	31.5533981323242
2005	35.9223289489746
2006	29.468599319458
2007	30.4347820281982
2008	29.8076915740967
2009	32.7014236450195
2010	33.1753540039063
2011	30.8056869506836
2012	35.0710906982422
2013	30.3317527770996
2014	29.0476188659668
2015	34.2857131958008
2016	19.0476188659668
2017	29.5238094329834
2018	29.7169818878174
2019	40.0943412780762
2020	42.4528312683105
2021	33.4905662536621
2022	33.4905662536621