Year	Number
1996	37
1998	33.8308448791504
2000	31.343282699585
2002	30.348258972168
2003	22.8855724334717
2004	26.4423084259033
2005	25.9615383148193
2006	20.6730766296387
2007	23.0769233703613
2008	22.115385055542
2009	25.5924167633057
2010	23.222749710083
2011	23.474178314209
2012	18.3098583221436
2013	19.2488269805908
2014	20.1970443725586
2015	19.2118225097656
2016	20.1970443725586
2017	17.7339897155762
2018	17.9611644744873
2019	17.3913040161133
2020	16.425121307373
2021	16.425121307373
2022	18.3574886322021