1984

7.3

1998

7.2

1992

7.6

1995

6.5

1960

7.6

2002

6.9

1999

6.1

2005

7.2

1987

7.1

2007

6.7

1979

6.9

1996

4.0

1982

7.6

1974

8.0

1996

7.5

1984

7.3

2018

0.0

2022

6.9

2022

0.0

1968

6.7