Year	Number
1996	25.543478012085
1998	26.0869560241699
2000	39.1304359436035
2002	40.5405387878418
2003	37.8378372192383
2004	38.8059692382813
2005	46.0784301757813
2006	49.5098037719727
2007	51.9417457580566
2008	53.3980598449707
2009	45.9330139160156
2010	47.3684196472168
2011	52.6066360473633
2012	52.6066360473633
2013	53.554500579834
2014	55.288459777832
2015	55.7142868041992
2016	53.8095245361328
2017	50.476188659668
2018	49.523811340332
2019	54.761905670166
2020	48.0952377319336
2021	46.1904754638672
2022	43.8679237365723