1997

6.8

1988

7.0

1968

7.5

1988

6.6

2008

6.4

1982

7.2

1958

3.0

1921

4.8

1940

5.8

2006

7.2

1997

7.0

1997

7.2

1962

5.0

2015

9.5

1956

6.0

2005

5.0

2004

7.4

2021

9.0

1947

7.5

2002

6.9