Year	Number
1996	55.7377052307129
1998	57.9234962463379
2000	53.5519142150879
2002	54.0540542602539
2003	51.3513526916504
2004	48.2587051391602
2005	46.5686264038086
2006	45.8536567687988
2007	50.4854354858398
2008	49.5145645141602
2009	49.7607650756836
2010	45.9330139160156
2011	53.0805702209473
2012	54.502368927002
2013	54.028434753418
2014	45.6730766296387
2015	46.1904754638672
2016	40.476188659668
2017	36.6666679382324
2018	30.4761905670166
2019	27.619047164917
2020	28.0952377319336
2021	25.7142848968506
2022	26.4150943756104