Year	Number
1996	38.2513656616211
1998	44.2622947692871
2000	43.7158470153809
2002	38.9189186096191
2003	37.8378372192383
2004	37.8109436035156
2005	28.9215679168701
2006	33.1707305908203
2007	26.6990299224854
2008	27.1844654083252
2009	31.5789470672607
2010	34.4497604370117
2011	29.8578205108643
2012	38.3886260986328
2013	41.7061614990234
2014	35.5769233703613
2015	35.238094329834
2016	33.8095245361328
2017	30.4761905670166
2018	24.761905670166
2019	31.9047622680664
2020	30.9523811340332
2021	32.3809509277344
2022	32.5471687316895