Year	Number
1996	15.957447052002
1998	26.5957450866699
2000	9.5238094329834
2002	7.40740728378296
2003	6.03015089035034
2004	4.85436916351318
2005	6.31067943572998
2006	2.4154589176178
2007	3.86473441123962
2008	5.28846168518066
2009	4.26540279388428
2010	2.84360194206238
2011	3.3175356388092
2012	3.3175356388092
2013	3.79146909713745
2014	5.2380952835083
2015	6.1904764175415
2016	6.1904764175415
2017	4.7619047164917
2018	4.24528312683105
2019	4.71698093414307
2020	4.71698093414307
2021	6.13207530975342
2022	7.54716968536377