Year	Number
1996	38.1909561157227
1998	41.5
2000	40.7960205078125
2002	40.2985076904297
2003	43.2835807800293
2004	36.538459777832
2005	37.7990417480469
2006	39.7129173278809
2007	35.4067001342773
2008	36.538459777832
2009	40.7582931518555
2010	35.5450248718262
2011	38.0281677246094
2012	40.3755874633789
2013	41.7840385437012
2014	37.980770111084
2015	39.0476188659668
2016	34.2857131958008
2017	31.4285717010498
2018	29.0476188659668
2019	25.7142848968506
2020	24.2857151031494
2021	25.7142848968506
2022	23.5849056243896