Year	Number
1996	32.1608047485352
1998	35.5
2000	39.8009948730469
2002	38.3084564208984
2003	41.2935333251953
2004	44.230770111084
2005	50.7177047729492
2006	49.7607650756836
2007	53.1100463867188
2008	56.730770111084
2009	53.0805702209473
2010	51.1848335266113
2011	53.051643371582
2012	55.3990592956543
2013	55.3990592956543
2014	62.019229888916
2015	62.8571434020996
2016	58.0952377319336
2017	62.3809509277344
2018	60.476188659668
2019	60.476188659668
2020	60.9523811340332
2021	60
2022	61.3207550048828