Year	Number
1993	1.3368682243759282
1994	3.0780924065767117
1995	4.244220092612391
1996	3.4871143205407167
1997	3.033849906716334
1998	2.4389132946075787
1999	3.2751092918071736
2000	3.4506598725224125
2001	3.0180655805472334
2002	7.091673596081402
2003	7.207313100793703
2004	3.9324944150913645
2005	3.5436656557838724
2006	2.448643469341512
2007	2.8755661662822227
2008	2.5123411843012846
2009	0.32960664639000214
2010	0.3441694478357801
2011	0.3164565286968552
2012	0.34701810643709113
2013	0.2787330313677288
2014	0.33368271654477016
2015	0.4100362325723585
2016	0.39655816873837363
2017	0.4596862605878111
2018	0.5910801289294799
2019	0.8293427720523839
2020	1.19927256877853
2021	0.9806590139611526
2022	0.9741917094105299
2023	1.0708093165651555