2007

5.2

1998

5.0

2000

6.7

1992

6.5

1996

6.1

1995

6.3

1996

5.9

2017

6.1

2000

6.2

1997

6.5

2003

6.5

2005

5.8

2008

4.1

1978

6.6

2004

6.0

1989

4.5

0.0

2012

5.5

1996

6.5

1977

6.8