1999

7.2

1996

8.1

2024

6.0

2001

7.6

2006

7.6

1978

8.0

1992

5.6

2002

6.4

1991

7.8

2002

0.0

2013

7.2

2017

7.5

1987

6.9

1974

7.0

1971

8.6

1967

7.8

1988

6.7

1999

8.2

2024

0.0

2021

7.8