Year	Number
1996	40.322582244873
1998	31.0160427093506
2000	28.1914901733398
2002	21.1640205383301
2003	23.8095245361328
2004	15.7635469436646
2005	13.1707315444946
2006	10.2439022064209
2007	11.6504850387573
2008	9.70873832702637
2009	6.22009563446045
2010	15.7142858505249
2011	16.1137447357178
2012	18.4834117889404
2013	17.5355453491211
2014	17.7884616851807
2015	16.1904754638672
2016	15.7142858505249
2017	17.1428565979004
2018	20
2019	16.6666660308838
2020	29.5238094329834
2021	24.761905670166
2022	25.4716987609863