Year	%
1989	6.077283
1993	5.120059
1995	8.645152
1996	8.776123
1997	6.720176
1998	6.405578
1999	5.74298
2000	5.836459
2001	5.815494
2002	5.729944
2003	15.95368
2004	5.85608
2005	5.888726
2006	5.862156
2007	5.779496
2008	5.939939
2009	5.56413
2010	5.726254
2011	5.710382
2012	5.676914
2013	5.401003
2014	5.514231
2015	5.470802
2016	5.651514
2017	5.337267
2018	5.450391
2019	5.658461
2020	5.289817
2021	5.421543