Year	Number
1996	53.2608680725098
1998	44.5652160644531
2000	39.1304359436035
2002	37.8378372192383
2003	32.4324340820313
2004	29.3532333374023
2005	37.7450981140137
2006	38.235294342041
2007	42.7184448242188
2008	49.5145645141602
2009	48.3253593444824
2010	47.8468894958496
2011	43.1279602050781
2012	38.8625602722168
2013	31.2796211242676
2014	28.365385055542
2015	24.761905670166
2016	17.619047164917
2017	21.9047622680664
2018	20.4761905670166
2019	21.9047622680664
2020	31.4285717010498
2021	34.2857131958008
2022	24.5283012390137