Year	Number
1996	12.5
1998	14.6739130020142
2000	14.6739130020142
2002	11.8918914794922
2003	4.32432413101196
2004	4.47761201858521
2005	2.45098042488098
2006	1.96078431606293
2007	1.94174754619598
2008	1.45631062984467
2009	1.43540668487549
2010	1.43540668487549
2011	0.947867274284363
2012	0.947867274284363
2013	0.473933637142181
2014	1.44230771064758
2015	1.90476191043854
2016	1.90476191043854
2017	0.952380955219269
2018	1.42857146263123
2019	1.42857146263123
2020	1.42857146263123
2021	0.476190477609634
2022	0.471698105335236