1988

7.3

2006

5.6

1955

7.1

2004

4.9

1989

6.8

1973

7.9

2006

6.7

1986

6.3

2002

6.4

2005

6.3

2003

7.0

1995

5.7

1993

7.3

1960

5.4

2001

6.4

2003

6.8

2000

6.9

1981

7.4

2024

6.3

1991

7.5