Year	%
2000	48.989417846967676
2001	48.78062986238721
2002	48.575644140267016
2003	48.37292621288587
2004	48.12703022488378
2005	47.8022915513307
2006	47.47954453208923
2007	47.0925133198788
2008	46.673609213989295
2009	46.24998433451527
2010	45.86722064366456
2011	45.531861151854585
2012	45.26696337830698
2013	45.01533370042727
2014	44.81814217638611
2015	44.650683419616605
2016	44.49659596789377
2017	44.30862384158964
2018	44.14637032215362
2019	43.988972536549085