Year	%
2001	5.34931128202376
2002	5.927355718332035
2003	6.7641550950856475
2004	6.6863258088786655
2005	7.125838113621322
2006	5.77130181827702
2007	6.926243001893183
2008	7.956288374844389
2009	8.623417560597476
2010	7.791056527291125
2011	7.621425089915175
2012	7.895374354266334
2013	8.06087311639654
2014	6.670060738506403
2015	6.585216899648773
2016	6.2039703283796195
2017	5.697404354894547
2018	6.087427254102259
2019	6.3479530031872455
2020	6.64571889373233
2021	5.775956728178007
2022	4.913448416032926
2023	5.338403666857587