1963

7.1

1967

6.6

1974

6.5

1981

6.5

1960

8.4

1995

8.2

1991

7.3

2006

7.5

1996

7.7

2007

6.1

1995

6.0

1994

5.4

2017

7.8

2014

7.2

1987

6.7

1991

0.0

2003

6.6

1993

6.6

2001

6.1

2023

5.9