1989

8.3

1955

7.5

1983

7.2

1979

7.0

1986

7.8

1956

7.9

2011

6.0

2002

8.4

2000

7.6

1987

7.3

1963

5.6

1959

8.0

2000

7.5

1966

7.2

1973

7.0

2004

6.3

1971

7.6

2001

7.4

2000

7.1

2023

5.0