Year	Number
1996	27.1356792449951
1998	35
2000	37.8109436035156
2002	40.7960205078125
2003	42.2885589599609
2004	40.8653831481934
2005	41.1483268737793
2006	40.1913871765137
2007	35.8851661682129
2008	28.8461532592773
2009	35.0710906982422
2010	35.5450248718262
2011	34.2723007202148
2012	38.0281677246094
2013	35.2112693786621
2014	39.4230766296387
2015	39.0476188659668
2016	30.9523811340332
2017	30.9523811340332
2018	28.0952377319336
2019	26.6666660308838
2020	29.0476188659668
2021	22.8571434020996
2022	20.7547168731689