Year	Number
1996	27.3224048614502
1998	36.6120223999023
2000	37.7049179077148
2002	41.0810813903809
2003	40.5405387878418
2004	41.7910461425781
2005	34.8039207458496
2006	33.6585350036621
2007	40.2912635803223
2008	32.0388336181641
2009	29.6650714874268
2010	35.4067001342773
2011	35.0710906982422
2012	32.2274894714355
2013	33.1753540039063
2014	31.25
2015	32.3809509277344
2016	30.4761905670166
2017	30.4761905670166
2018	24.2857151031494
2019	28.0952377319336
2020	29.0476188659668
2021	31.4285717010498
2022	31.1320762634277