Year	Number
1996	37.5
1998	41.7910461425781
2000	34.3283576965332
2002	25.3731346130371
2003	26.8656711578369
2004	23.0769233703613
2005	24.0384616851807
2006	31.730770111084
2007	32.6923065185547
2008	30.769229888916
2009	30.3317527770996
2010	36.4928894042969
2011	42.2535209655762
2012	40.8450698852539
2013	38.4976539611816
2014	39.9014778137207
2015	40.3940887451172
2016	39.4088668823242
2017	37.9310340881348
2018	36.4077682495117
2019	36.2318840026855
2020	37.6811599731445
2021	38.6473426818848
2022	42.0289840698242