Year	Number
1996	33.668342590332
1998	36
2000	35.3233833312988
2002	37.8109436035156
2003	35.3233833312988
2004	35.5769233703613
2005	32.0574150085449
2006	28.7081336975098
2007	34.4497604370117
2008	37.980770111084
2009	41.2322273254395
2010	38.8625602722168
2011	40.8450698852539
2012	35.6807518005371
2013	37.5586853027344
2014	40.3846168518066
2015	40.9523811340332
2016	41.4285697937012
2017	45.238094329834
2018	48.5714302062988
2019	44.761905670166
2020	51.4285697937012
2021	52.8571434020996
2022	52.8301887512207