Year	%
1989	98.80067
1994	99.2999
1998	71.88559
1999	55.84057
2000	55.56928
2001	50.0226
2002	50.99499
2003	49.83314
2004	48.32995
2005	39.73512
2006	38.81684
2007	38.8267
2008	35.71705
2009	39.75075
2010	38.67823
2011	38.61651
2012	37.5195
2013	37.2136
2015	35.52248
2016	38.64893
2019	37.65715
2020	38.41061
2021	38.70441