Year	Number
1994	57.750797311684856
1995	5.473986310083754
1996	4.482237302883133
1997	5.653309566428914
1998	6.701565073772551
1999	6.889740611954206
2000	6.420250104587216
2001	4.718412083960501
2002	3.10195952160889
2003	4.513809351439018
2004	4.888879976069131
2005	4.349628343906917
2006	5.887806764083236
2007	2.7327414289674343
2008	4.731132113425226
2009	2.4189744602486978
2010	3.357768541971329
2011	2.842638759615764
2012	2.389992399904978
2013	3.2714081340088983
2014	4.621302038722337
2015	4.919633377903236
2016	3.4755204912364164
2017	2.8190325401756193
2018	2.964345643886964
2019	2.4687083890065087
2020	2.788244785826684
2021	2.5412503769686206