Year	Number
1996	35.638298034668
1998	29.7872333526611
2000	23.280424118042
2002	26.4550266265869
2003	29.1457290649414
2004	24.2718448638916
2005	33.980583190918
2006	25.1207733154297
2007	38.164249420166
2008	46.6346168518066
2009	44.5497627258301
2010	40.2843589782715
2011	39.3364944458008
2012	45.497631072998
2013	40.7582931518555
2014	36.1904754638672
2015	30
2016	24.761905670166
2017	27.619047164917
2018	31.6037731170654
2019	23.5849056243896
2020	24.056604385376
2021	20.2830181121826
2022	26.8867931365967