Year	Number
1996	56.9892463684082
1998	67.3796768188477
2000	63.8297882080078
2002	58.7301597595215
2003	59.2592582702637
2004	59.6059112548828
2005	57.5609741210938
2006	59.0243911743164
2007	56.7961158752441
2008	53.3980598449707
2009	52.1531105041504
2010	47.1428565979004
2011	45.0236968994141
2012	42.6540298461914
2013	47.8672981262207
2014	44.711540222168
2015	45.7142868041992
2016	42.3809509277344
2017	43.8095245361328
2018	45.238094329834
2019	48.0952377319336
2020	45.7142868041992
2021	50.476188659668
2022	48.113208770752