Year	Number
1992	1.3824086804379834
1993	1.4417433261194168
1994	2.29299268955009
1995	2.135011229858128
1996	2.6826606204556853
1997	3.8687294327327386
1998	3.9134637268967163
1999	3.3892761653220376
2000	3.2649070619776492
2001	4.468485169179076
2002	6.510172237011362
2003	6.262110958422405
2004	5.1019514176798895
2005	4.185979588568481
2006	3.0923800691106544
2007	0.3520295570985319
2008	0.2748423182020109
2009	0.4292217249621815
2010	0.4010853317022511
2011	0.3116231137307845
2012	0.33509934255945184
2013	0.3199541604884919
2014	0.33707254019084737
2015	0.3182652221940858
2016	0.2653165601340272
2017	0.27635217893247005
2018	0.2534749361442471
2019	0.2789513576478934
2020	0.39996091243912485
2021	0.5297408439915342
2022	0.4635619958179098
2023	0.503569205187806