Year	Number
1996	22.8260860443115
1998	26.6304340362549
2000	17.3913040161133
2002	13.5135135650635
2003	16.7567558288574
2004	15.9203977584839
2005	15.6862745285034
2006	6.37254905700684
2007	4.85436916351318
2008	3.88349509239197
2009	3.82775115966797
2010	5.74162673950195
2011	8.53080558776855
2012	9.00473976135254
2013	10.9004735946655
2014	8.17307662963867
2015	5.2380952835083
2016	7.61904764175415
2017	8.09523773193359
2018	9.0476188659668
2019	10
2020	10.4761905670166
2021	12.380952835083
2022	20.2830181121826