1991

7.2

1998

6.1

1970

8.0

1967

6.8

1963

7.9

1976

7.5

1999

5.2

2002

6.9

1993

6.4

1986

7.3

1994

8.0

1972

6.1

2023

8.1

2016

8.2

1971

7.5

1975

1.0

2004

7.2

1989

5.8

2022

7.0

1974

5.3