Year	Number
1996	25.6830596923828
1998	24.5901641845703
2000	19.6721305847168
2002	30.2702693939209
2003	35.1351356506348
2004	44.2786064147949
2005	29.9019603729248
2006	34.1463432312012
2007	41.262134552002
2008	42.7184448242188
2009	48.8038291931152
2010	44.0191383361816
2011	48.3412322998047
2012	44.5497627258301
2013	44.0758285522461
2014	53.3653831481934
2015	54.2857131958008
2016	55.238094329834
2017	57.6190490722656
2018	55.238094329834
2019	49.0476188659668
2020	48.0952377319336
2021	50.9523811340332
2022	56.6037750244141