2001

7.8

2004

7.3

1991

6.8

2007

7.3

2006

7.8

2006

6.6

2000

8.0

1951

6.1

2017

7.1

1984

5.9

2007

6.8

2016

3.5

1953

5.0

2008

6.3

2007

4.8

2008

6.6

1932

6.0

1982

5.5

1966

0.0

1988

8.0