Year	%
2000	38.44840679987234
2001	37.48789007949629
2002	37.75265749099423
2003	37.395572465226614
2004	37.03060155473778
2005	37.3647170633511
2006	36.166423578151026
2007	35.786753904005536
2008	35.1149588217789
2009	34.0663224681018
2010	33.43968917716266
2011	32.49097943898723
2012	31.677506711011333
2013	30.93399431655749
2014	31.032459923951485
2015	30.168800606333164
2016	29.832206598469728
2017	29.29642511466528
2018	29.172616547616084
2019	28.681011809363252