Year	%
2000	28.273380053664752
2001	27.677136848035875
2002	27.30464898155544
2003	27.093019188746254
2004	26.77825228233059
2005	26.54215191534333
2006	26.339168249603542
2007	26.00463780672767
2008	25.893701095945595
2009	25.608198666149264
2010	25.198797604274237
2011	24.75916221156299
2012	24.275140365202656
2013	23.940070934644698
2014	23.630566970481308
2015	23.450471040553015
2016	23.210246070950475
2017	22.8814395807676
2018	22.531560254028747
2019	22.263811712178175