Year	Number
1992	13.424116216056724
1993	2.1861561325133905
1994	1.979810355823354
1995	1.4440401175053046
1996	1.3545286335976665
1997	1.074416607049914
1998	1.9282146102186886
1999	1.5737322275465397
2000	1.1895874347504638
2001	1.4602045923408868
2002	1.5844199581145118
2003	3.013581746413817
2004	3.4384487769521246
2005	2.8395455206223787
2006	1.810026244194579
2007	2.047865374232244
2008	2.9617841620122265
2009	1.5091282308508631
2010	1.506992335434204
2011	2.0696287976731473
2012	1.3589326145297134
2013	2.7594078166926352
2014	3.5414068752477483
2015	3.8565076079484624
2016	4.356252457741745
2017	2.155033130239399
2018	2.2189607219563388
2019	1.792466090471551
2020	1.9144757234247278
2021	2.232606851928865
2022	2.779304763972038
2023	2.269967389376028