Year	Number
1996	15.7608699798584
1998	16.3043479919434
2000	16.3043479919434
2002	25.4054050445557
2003	21.0810813903809
2004	31.8407955169678
2005	25
2006	36.764705657959
2007	45.6310691833496
2008	50
2009	51.6746406555176
2010	52.1531105041504
2011	52.6066360473633
2012	51.6587677001953
2013	51.6587677001953
2014	50
2015	48.0952377319336
2016	48.5714302062988
2017	48.5714302062988
2018	49.523811340332
2019	49.523811340332
2020	45.238094329834
2021	46.1904754638672
2022	43.8679237365723