Year	Number
1996	21.2765960693359
1998	22.340425491333
2000	25.9259262084961
2002	17.4603176116943
2003	32.6633148193359
2004	26.2135925292969
2005	19.4174766540527
2006	33.3333320617676
2007	36.2318840026855
2008	33.6538467407227
2009	41.2322273254395
2010	37.4407577514648
2011	36.4928894042969
2012	39.3364944458008
2013	36.4928894042969
2014	20.9523811340332
2015	25.7142848968506
2016	25.7142848968506
2017	27.1428565979004
2018	28.7735843658447
2019	25.4716987609863
2020	23.5849056243896
2021	24.056604385376
2022	27.3584899902344