1979

8.3

1982

7.5

1985

6.7

1994

8.5

2014

6.7

1987

8.1

2004

6.1

1991

6.6

1986

7.7

1987

7.3

1991

7.6

2004

6.5

1971

0.0

1997

3.4

2023

7.7

2025

6.2

2007

7.0

1983

6.2

1984

7.1

1988

6.3