Year	Number
1992	0.2861414572444938
1993	0.8123195318763372
1994	1.1951476166224315
1995	1.135804678715791
1996	0.9854276031380237
1997	1.2907181749755947
1998	1.506009786401908
1999	1.8870153208489011
2000	1.679746265697593
2001	1.487542867598373
2002	2.369404916052421
2003	1.898250223105055
2004	1.5097768435476149
2005	1.232364105021682
2006	1.6376376507940853
2007	2.658694999200164
2008	3.004448808255468
2009	4.55500536671567
2010	3.1225490763551735
2011	3.207603981991655
2012	2.634318591934718
2013	2.513184588325505
2014	1.7467892974296295
2015	2.7510442627672926
2016	3.221987991076364
2017	4.305981224617892
2018	3.5806438095405175
2019	3.8277502332137803
2020	5.042878561892211
2021	4.56352204968555
2022	4.091735061119887
2023	3.854204761897164