Year	Number
1996	57.7889442443848
1998	59
2000	56.7164192199707
2002	57.2139320373535
2003	62.6865653991699
2004	57.211540222168
2005	56.9377975463867
2006	52.6315803527832
2007	55.9808616638184
2008	53.3653831481934
2009	49.7630348205566
2010	47.3933639526367
2011	46.478874206543
2012	40.8450698852539
2013	36.6197166442871
2014	40.3846168518066
2015	36.1904754638672
2016	31.9047622680664
2017	31.4285717010498
2018	30.4761905670166
2019	27.1428565979004
2020	24.2857151031494
2021	25.238094329834
2022	23.5849056243896