1981

7.4

2005

7.6

2003

6.1

1994

5.5

1988

7.4

2005

6.5

2023

7.4

2008

7.2

1994

6.9

1993

7.0

1999

6.1

2025

4.5

1967

6.6

1910

6.0

1974

7.9

1948

7.1

1996

5.2

1995

4.6

1975

2.4

1999

6.8