Year	%
1997	7.15596330275229
1998	8.10313075506446
1999	8.44036697247707
2000	9.00735294117647
2001	8.83977900552486
2002	8.83977900552486
2003	8.83977900552486
2004	8.25688073394496
2005	8.28729281767956
2006	8.25688073394496
2007	9.05730129390018
2008	9.05730129390018
2009	10.8256880733945
2010	10.8256880733945
2011	11.0091743119266
2012	11.0091743119266
2013	11.0091743119266
2014	11.4180478821363
2015	11.9705340699816
2016	11.9705340699816
2017	11.8081180811808
2018	11.8081180811808
2019	14.3911439114391
2020	14.3646408839779
2021	14.4444444444444
2022	14.9446494464945
2023	15.2416356877323