Year	Number
1996	53.2663307189941
1998	50
2000	55.2238807678223
2002	54.7263679504395
2003	51.243782043457
2004	57.211540222168
2005	54.5454559326172
2006	44.9760780334473
2007	43.5406684875488
2008	44.711540222168
2009	44.5497627258301
2010	42.1800956726074
2011	43.1924896240234
2012	40.3755874633789
2013	40.3755874633789
2014	37.980770111084
2015	34.2857131958008
2016	31.9047622680664
2017	31.4285717010498
2018	32.3809509277344
2019	29.0476188659668
2020	28.0952377319336
2021	22.380952835083
2022	23.1132068634033