1971

4.8

1987

7.1

1999

6.8

2020

4.0

2003

7.2

1984

6.2

1985

7.7

1992

7.4

1999

7.1

1974

7.5

1969

5.1

1968

5.5

2023

8.0

2004

6.3

1982

6.0

1961

4.6

2006

6.6

2004

1.0

1997

6.6

2025

10.0