1993

7.3

1999

6.1

2004

5.2

1999

6.5

2000

7.1

2006

6.6

1989

1.0

1997

6.0

2002

6.7

1987

7.1

1965

6.9

2009

5.6

2024

6.4

1957

7.0

2009

8.0

2000

5.4

1938

5.5

2025

7.0

1966

6.6

2009

5.2