Year	Number
1996	57.5
1998	58.7064666748047
2000	58.2089538574219
2002	62.6865653991699
2003	62.1890563964844
2004	60.5769233703613
2005	63.9423065185547
2006	61.0576934814453
2007	63.9423065185547
2008	63.9423065185547
2009	62.5592422485352
2010	65.8767776489258
2011	63.3802833557129
2012	62.9107971191406
2013	60.5633811950684
2014	62.0689659118652
2015	62.0689659118652
2016	62.0689659118652
2017	61.0837440490723
2018	59.7087364196777
2019	56.5217399597168
2020	57.0048294067383
2021	56.038646697998
2022	55.5555572509766