1971

7.1

1990

7.7

1980

8.2

2009

8.2

1999

8.4

1995

8.4

2023

8.1

1985

8.3

2018

8.2

1966

8.5

2020

7.2

1992

8.1

1993

7.2

1979

8.2

2007

7.8

1992

6.8

1977

7.7

2004

7.2

1977

8.2

1997

8.2