Year	%
1989	93.24856
1990	85.12403
1991	78.85492
1992	73.27446
1993	60.93397
1994	49.57553
1995	44.56746
1996	48.20919
1997	48.25394
1998	61.75445
1999	25.23176
2000	59.92148
2001	47.12253
2002	46.32043
2003	45.3313
2004	38.83799
2005	28.75435
2006	26.46226
2007	27.41669
2008	27.31863
2009	27.33989
2010	27.69222
2011	28.54526
2012	29.03679
2013	31.7196
2014	28.93011
2015	28.53347
2016	28.3372
2017	29.18521
2018	29.01665
2019	28.79889
2020	28.91861
2021	28.18243