Year	Number
1996	15.7608699798584
1998	18.4782600402832
2000	28.2608699798584
2002	25.4054050445557
2003	25.4054050445557
2004	24.3781089782715
2005	30.8823528289795
2006	29.4117641448975
2007	26.6990299224854
2008	25.2427177429199
2009	28.7081336975098
2010	26.3157901763916
2011	28.9099521636963
2012	24.6445503234863
2013	24.1706161499023
2014	25.480770111084
2015	26.1904754638672
2016	28.0952377319336
2017	29.5238094329834
2018	30.9523811340332
2019	33.8095245361328
2020	36.1904754638672
2021	36.6666679382324
2022	39.1509437561035