Year	%
2000	34.38146714438314
2001	33.651632899084426
2002	33.04311678722918
2003	32.435251634245915
2004	31.805081891799997
2005	31.090702203817962
2006	30.383725826546115
2007	29.650945997770283
2008	28.971467472694076
2009	28.31207492972321
2010	27.687737652372874
2011	27.257844472213105
2012	26.92359770195145
2013	26.723995429401405
2014	26.599058752941307
2015	26.611260790401985
2016	26.721686245998967
2017	26.63581835643425
2018	26.571306631008078
2019	26.576728047877094