Year	%
1997	3.9198606271777012
1998	3.4936138241923373
1999	3.8791495710555743
2000	3.881700554528649
2001	3.99556048834628
2002	5.678466076696166
2003	6.014434643143546
2004	6.957217113154747
2005	6.40907697025453
2006	8.632425742574267
2007	8.849009900990108
2008	8.767038413878574
2009	9.085347200978898
2010	10.98317094774136
2011	10.508701472556886
2012	14.167433302667888
2013	16.420064958498735
2014	16.75108538350217
2015	16.901918204849792
2016	17.567159674011474
2017	16.581402347276573
2018	16.937424789410368
2019	16.26865671641793
2020	18.432076600837842
2021	17.021933889403766
2022	17.27781230577998
2023	16.608447126071763