Year	Number
1996	5
1998	7.46268653869629
2000	8.95522403717041
2002	6.96517419815063
2003	7.96019887924194
2004	5.76923084259033
2005	8.17307662963867
2006	8.17307662963867
2007	6.73076915740967
2008	5.76923084259033
2009	7.5829381942749
2010	13.7440757751465
2011	15.962441444397
2012	14.5539903640747
2013	14.5539903640747
2014	19.7044334411621
2015	20.1970443725586
2016	22.660099029541
2017	22.660099029541
2018	21.3592224121094
2019	21.2560386657715
2020	17.3913040161133
2021	16.425121307373
2022	14.0096616744995