Year	Number
1996	0.623442530632019
1998	0.765376150608063
2000	0.929349541664124
2002	0.838327348232269
2003	0.711256563663483
2004	0.590961158275604
2005	0.777662575244904
2006	0.898599565029144
2007	0.835530936717987
2008	0.845082819461823
2009	0.789260983467102
2010	0.824986040592194
2011	0.957096934318542
2012	0.709167778491974
2013	0.804738223552704
2014	0.99187958240509
2015	0.994889318943024
2016	1.04852175712585
2017	1.04009079933167
2018	1.02394342422485
2019	1.02817916870117
2020	1.05488479137421
2021	1.04582393169403
2022	1.09546458721161