Year	Number
1996	23.3695659637451
1998	22.2826080322266
2000	21.7391300201416
2002	14.5945949554443
2003	17.8378372192383
2004	17.412935256958
2005	20.5882358551025
2006	22.5490188598633
2007	22.3300971984863
2008	20.8737869262695
2009	26.3157901763916
2010	27.2727279663086
2011	27.962085723877
2012	27.014217376709
2013	25.5924167633057
2014	17.3076915740967
2015	18.0952377319336
2016	19.0476188659668
2017	20.4761905670166
2018	26.1904754638672
2019	24.2857151031494
2020	22.380952835083
2021	24.761905670166
2022	27.8301887512207