Year	%
1989	49.40831
1990	47.97391
1993	48.31052
1995	39.03874
1996	26.98699
1997	53.84245
1998	11.03846
1999	25.90663
2000	11.14527
2001	3.083941
2002	2.979603
2003	3.133229
2004	6.987374
2005	6.789559
2006	6.574374
2007	12.73369
2008	3.661355
2009	10.93572
2010	7.213481
2011	7.614662
2012	1.468665
2013	7.946181
2016	6.879239
2017	12.02772
2018	7.871694
2019	8.24086
2020	8.508014
2021	7.820616