Year	%
1997	16.001174398120973
1998	16.340129288911
1999	17.289859407717618
2000	18.04857173424628
2001	17.72833485725896
2002	19.24101908112141
2003	19.506881869492027
2004	20.088656054805554
2005	20.698845128812554
2006	21.09983246279689
2007	22.237555446032538
2008	22.38864800946
2009	23.087525844245352
2010	23.16701112095266
2011	23.963768829378754
2012	25.027074923697942
2013	26.165650206570923
2014	26.790902715158797
2015	27.843294023585855
2016	27.96559311862373
2017	28.871681415929203
2018	29.87486451867179
2019	30.80181245074862
2020	31.499013806706113
2021	32.42340926944226
2022	32.52212389380531
2023	32.828637320766056