Year	%
1997	3.9198606271777012
1998	3.4936138241923373
1999	3.8791495710555735
2000	3.8817005545286487
2001	3.995560488346279
2002	5.678466076696165
2003	6.014434643143546
2004	6.957217113154747
2005	6.409076970254531
2006	8.632425742574268
2007	8.84900990099011
2008	8.767038413878574
2009	9.085347200978896
2010	10.98317094774136
2011	10.508701472556886
2012	14.167433302667886
2013	16.420064958498735
2014	16.751085383502172
2015	16.901918204849792
2016	17.56715967401147
2017	16.581402347276576
2018	16.937424789410368
2019	16.26865671641793
2020	18.43207660083784
2021	17.021933889403766
2022	17.27781230577998
2023	16.608447126071763