Year	Number
1996	1.62002718448639
1998	1.5973025560379
2000	1.68575727939606
2002	1.78612041473389
2003	1.81680715084076
2004	1.33226644992828
2005	1.50157427787781
2006	0.830167770385742
2007	0.987038195133209
2008	0.912503182888031
2009	0.9416823387146
2010	0.942974150180817
2011	0.97240149974823
2012	1.05716216564178
2013	1.16825199127197
2014	1.17389130592346
2015	1.15785312652588
2016	1.095534324646
2017	1.00121974945068
2018	0.969287812709808
2019	0.968881249427795
2020	0.854268252849579
2021	0.909273445606232
2022	0.92075788974762