Year	%
2001	3.779575713445577
2002	9.65345261884277
2003	3.7401732613209795
2004	3.6683460264447443
2005	3.2781538951567484
2006	3.017153079763282
2007	3.3798780439925977
2008	3.3462018072196766
2009	3.5022985638246737
2010	3.934741271878786
2011	3.9810976351211704
2012	3.5268307442792994
2013	3.54018854420615
2014	3.4530616995053136
2015	3.138472829744063
2016	3.498897550815303
2017	3.4642460538538056
2018	3.330655853181594
2019	3.3860516505803138
2020	3.1970330552180397
2021	3.3136900630088637
2022	3.8869573474476504
2023	4.289138655097522