Year	Number
1996	38.2513656616211
1998	30.0546455383301
2000	26.2295074462891
2002	41.0810813903809
2003	37.2972984313965
2004	19.4029846191406
2005	34.8039207458496
2006	23.9024391174316
2007	22.3300971984863
2008	22.3300971984863
2009	28.2296657562256
2010	28.2296657562256
2011	27.014217376709
2012	25.5924167633057
2013	25.1184825897217
2014	17.3076915740967
2015	13.8095235824585
2016	10
2017	8.5714282989502
2018	9.0476188659668
2019	9.0476188659668
2020	8.09523773193359
2021	10.4761905670166
2022	10.8490562438965