Year	Number
1996	1.11418783664703
1998	1.16277480125427
2000	0.827235400676727
2002	0.773913145065308
2003	0.898586511611938
2004	1.01579594612122
2005	0.902103662490845
2006	1.02647280693054
2007	1.00999546051025
2008	0.93939745426178
2009	1.05151796340942
2010	0.917391359806061
2011	0.941719472408295
2012	0.832158982753754
2013	0.722276329994202
2014	0.721844375133514
2015	0.737542390823364
2016	0.785221040248871
2017	0.776947557926178
2018	0.836427569389343
2019	0.888942241668701
2020	0.777626574039459
2021	0.693418622016907
2022	0.76738029718399