Year	Number
1996	38.6934661865234
1998	40.5
2000	44.2786064147949
2002	46.2686576843262
2003	44.7761192321777
2004	43.75
2005	41.6267929077148
2006	41.1483268737793
2007	43.0622024536133
2008	39.4230766296387
2009	27.962085723877
2010	21.8009471893311
2011	20.6572761535645
2012	19.2488269805908
2013	18.7793426513672
2014	26.4423084259033
2015	28.5714282989502
2016	19.5238094329834
2017	20
2018	20.4761905670166
2019	15.7142858505249
2020	20.4761905670166
2021	20.4761905670166
2022	18.3962268829346