Year	%
1997	8.522727272727275
1998	7.928118393234671
1999	10.328638497652578
2000	11.258278145695357
2001	11.69977924944812
2002	13.418530351437694
2003	13.53965183752418
2004	13.48314606741574
2005	14.727954971857415
2006	13.33914559721012
2007	13.599999999999998
2008	15.594541910331376
2009	15.749525616698293
2010	16.524216524216527
2011	17.41198858230256
2012	18.1731684110371
2013	17.963496637848223
2014	17.843511450381676
2015	17.731172545281225
2016	18.408880666049956
2017	17.889908256880734
2018	19.28702010968921
2019	20.692798541476765
2020	21.703296703296697
2021	22.851919561243147
2022	24.050632911392402
2023	24.206708975521305