Year	Number
1996	68.5
1998	69.651741027832
2000	70.1492538452148
2002	72.1393051147461
2003	70.1492538452148
2004	73.5576934814453
2005	70.6730804443359
2006	65.8653869628906
2007	67.788459777832
2008	69.2307662963867
2009	70.1421813964844
2010	72.0379180908203
2011	72.7699508666992
2012	73.7089233398438
2013	72.3004684448242
2014	72.9064025878906
2015	72.9064025878906
2016	67.9802932739258
2017	66.5024642944336
2018	65.0485458374023
2019	61.835750579834
2020	59.4202880859375
2021	59.4202880859375
2022	59.9033813476563