1997

7.4

2001

7.9

1998

7.1

1997

8.2

1981

7.5

2007

7.4

2007

6.7

1985

7.7

2006

6.6

1973

3.5

1936

6.5

1969

0.0

2014

6.5

1974

7.5

1995

7.0

2019

6.7

2006

6.2

1987

7.5

2006

7.1

2001

6.5