Year	Number
1996	35.5
1998	41.2935333251953
2000	37.3134346008301
2002	45.2736320495605
2003	42.7860679626465
2004	41.3461532592773
2005	37.980770111084
2006	42.788459777832
2007	44.711540222168
2008	44.711540222168
2009	43.1279602050781
2010	43.1279602050781
2011	43.1924896240234
2012	40.8450698852539
2013	42.2535209655762
2014	46.7980308532715
2015	45.8128089904785
2016	46.305419921875
2017	43.8423652648926
2018	38.3495140075684
2019	42.512077331543
2020	40.0966186523438
2021	36.7149772644043
2022	32.3671493530273