Year	Number
1996	31.1557788848877
1998	39
2000	50.7462692260742
2002	48.2587051391602
2003	51.243782043457
2004	54.8076934814453
2005	55.0239219665527
2006	52.1531105041504
2007	54.5454559326172
2008	55.769229888916
2009	55.4502372741699
2010	56.8720397949219
2011	58.2159614562988
2012	59.1549301147461
2013	58.2159614562988
2014	63.461540222168
2015	60.476188659668
2016	62.3809509277344
2017	61.4285697937012
2018	61.9047622680664
2019	61.9047622680664
2020	59.0476188659668
2021	58.5714302062988
2022	61.3207550048828