Year	Number
1996	15.8469944000244
1998	18.032787322998
2000	18.032787322998
2002	23.2432441711426
2003	23.7837829589844
2004	19.9004974365234
2005	28.4313716888428
2006	28.2926826477051
2007	25.2427177429199
2008	20.8737869262695
2009	20.0956935882568
2010	19.6172256469727
2011	17.5355453491211
2012	16.5876770019531
2013	17.0616111755371
2014	16.8269233703613
2015	18.0952377319336
2016	19.0476188659668
2017	15.7142858505249
2018	13.3333330154419
2019	10.9523811340332
2020	12.8571424484253
2021	13.8095235824585
2022	23.1132068634033