1992

5.3

1987

7.3

2024

7.1

2016

6.0

2006

6.2

1997

6.1

2007

6.0

2001

5.4

1976

5.0

2004

5.5

1978

7.4

1993

7.4

2005

5.7

1999

6.4

1990

6.6

2007

6.3

1963

7.7

2003

6.3

1968

4.2

2008

6.6