Year	Number
1996	24.7311820983887
1998	26.7379684448242
2000	26.5957450866699
2002	29.6296291351318
2003	33.3333320617676
2004	31.0344829559326
2005	34.1463432312012
2006	35.6097564697266
2007	40.7766990661621
2008	41.7475738525391
2009	38.2775115966797
2010	37.6190490722656
2011	42.1800956726074
2012	47.8672981262207
2013	46.9194297790527
2014	45.1923065185547
2015	43.8095245361328
2016	41.4285697937012
2017	34.2857131958008
2018	28.0952377319336
2019	27.619047164917
2020	26.1904754638672
2021	25.7142848968506
2022	34.4339637756348