Year	%
2000	30.572109972828848
2001	30.406692199160517
2002	30.045535304186988
2003	29.790755820090066
2004	29.525456482120518
2005	28.98999476539143
2006	28.383935600972652
2007	28.081888546978384
2008	27.385366863956502
2009	26.815467947286123
2010	26.21841733186598
2011	25.797979648970063
2012	25.390049661052483
2013	24.924469314584975
2014	24.795213506479723
2015	24.473527131103676
2016	24.254142128713326
2017	24.06536772164188
2018	24.029165305917854
2019	23.771616144896726