Year	Number
1996	58.2914581298828
1998	59.5
2000	51.7412948608398
2002	58.2089538574219
2003	61.1940307617188
2004	57.6923065185547
2005	45.9330139160156
2006	45.9330139160156
2007	45.4545440673828
2008	44.711540222168
2009	46.445499420166
2010	43.1279602050781
2011	48.3568077087402
2012	43.1924896240234
2013	43.6619720458984
2014	43.269229888916
2015	41.9047622680664
2016	45.7142868041992
2017	41.9047622680664
2018	43.8095245361328
2019	45.238094329834
2020	44.761905670166
2021	44.761905670166
2022	45.7547187805176