2003

6.5

2008

6.9

1980

6.9

1993

5.4

2008

6.2

2003

7.0

2004

7.2

1994

8.3

2000

8.1

1993

5.5

1991

7.5

2007

5.4

1989

6.3

1998

6.4

1976

7.6

2017

0.0

2002

6.4

2006

6.5

2005

6.3

1990

6.3