Year	Number
1996	-0.203338757157326
1998	0.14405956864357
2000	-0.0419168248772621
2002	0.0108463577926159
2003	0.242927804589272
2004	0.153246521949768
2005	0.367340832948685
2006	0.356723546981812
2007	0.338474422693253
2008	0.230154260993004
2009	0.202161014080048
2010	0.203808978199959
2011	0.279343724250793
2012	0.238223135471344
2013	0.32152447104454
2014	0.410171538591385
2015	0.43438395857811
2016	0.396033018827438
2017	0.501099586486816
2018	0.297805100679398
2019	0.480807155370712
2020	0.693269371986389
2021	0.72086238861084
2022	0.693852961063385