Year	Number
1998	55.7213935852051
2000	51.7412948608398
2002	63.6815910339355
2003	64.1791076660156
2004	67.3076934814453
2005	64.9038467407227
2006	60.5769233703613
2007	60.0961532592773
2008	59.6153831481934
2009	60.1895751953125
2010	58.7677726745605
2011	61.0328636169434
2012	61.9718322753906
2013	59.1549301147461
2014	59.6059112548828
2015	58.6206893920898
2016	55.6650238037109
2017	57.6354675292969
2018	57.2815551757813
2019	54.1062812805176
2020	56.038646697998
2021	58.4541053771973
2022	61.3526573181152