1988

6.2

1949

6.8

2003

6.3

1999

8.0

1992

6.8

2007

6.3

1987

6.3

1965

6.3

1958

7.0

2018

4.7

1960

4.8

1973

7.0

2003

5.2

1921

0.0

1921

0.0

1966

0.0

2004

6.5

1988

7.0

1992

4.3

2008

6.1