Year	Number
1996	0.361694604158401
1998	1.0588550567627
2000	1.15730142593384
2002	0.831208944320679
2003	1.18648135662079
2004	1.12390494346619
2005	1.0276792049408
2006	0.926921546459198
2007	0.952527701854706
2008	1.11487662792206
2009	1.22328507900238
2010	1.15385591983795
2011	1.17473101615906
2012	1.22359883785248
2013	1.21254646778107
2014	0.977457761764526
2015	0.983597457408905
2016	0.884123742580414
2017	0.647981882095337
2018	0.649283885955811
2019	0.68427562713623
2020	0.66954380273819
2021	0.833261430263519
2022	0.958558142185211