Year	Number
1996	50
1998	47.2636833190918
2000	44.7761192321777
2002	37.3134346008301
2003	31.8407955169678
2004	27.884614944458
2005	30.2884616851807
2006	32.211540222168
2007	31.25
2008	33.1730766296387
2009	38.3886260986328
2010	36.9668235778809
2011	36.1502342224121
2012	34.7417831420898
2013	34.7417831420898
2014	32.019702911377
2015	30.5418720245361
2016	30.5418720245361
2017	30.0492610931396
2018	27.1844654083252
2019	26.57004737854
2020	26.57004737854
2021	28.019323348999
2022	28.019323348999