1998

5.9

2016

6.0

2005

5.1

2007

6.5

1965

7.4

1968

6.5

2014

5.4

1971

6.8

2012

4.3

2007

6.2

2005

7.0

1992

6.8

2005

6.2

1993

6.3

1991

6.7

1984

6.0

2002

6.2

1997

6.8

2005

6.7

2001

6.0