Year	Number
1996	8.51063823699951
1998	7.97872352600098
2000	12.1693124771118
2002	3.17460322380066
2003	4.52261304855347
2004	0.970873773097992
2005	0.485436886548996
2006	5.31400966644287
2007	7.24637699127197
2008	6.73076915740967
2009	9.95260620117188
2010	9.95260620117188
2011	9.47867298126221
2012	13.7440757751465
2013	17.5355453491211
2014	13.8095235824585
2015	13.8095235824585
2016	12.380952835083
2017	13.3333330154419
2018	13.6792449951172
2019	11.7924528121948
2020	10.3773584365845
2021	8.49056625366211
2022	7.54716968536377