2002

6.3

1992

5.4

1992

6.9

2008

6.3

1994

6.2

2005

6.4

2005

7.0

2017

5.2

2002

6.0

2007

8.1

2005

5.9

2007

7.1

1998

6.6

2006

5.8

2007

6.1

2009

7.1

2007

7.9

1993

6.2

1987

0.0

2003

7.0