Year	Number
1998	32.8358192443848
2000	32.3383102416992
2002	49.2537307739258
2003	51.7412948608398
2004	53.3653831481934
2005	55.769229888916
2006	55.288459777832
2007	55.288459777832
2008	55.769229888916
2009	55.9241714477539
2010	55.4502372741699
2011	55.3990592956543
2012	56.8075103759766
2013	56.3380279541016
2014	53.2019691467285
2015	50.7389144897461
2016	49.2610855102539
2017	50.7389144897461
2018	49.5145645141602
2019	47.3429946899414
2020	47.8260879516602
2021	53.1400947570801
2022	56.5217399597168