Year	Number
1996	3.72340416908264
1998	6.38297891616821
2000	5.8201060295105
2002	3.70370364189148
2003	4.02010059356689
2004	3.39805817604065
2005	3.88349509239197
2006	7.24637699127197
2007	3.86473441123962
2008	1.92307686805725
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0