2007

6.2

1971

6.1

2008

7.3

2008

6.7

1939

6.3

1953

8.0

2009

5.3

1972

7.5

1998

7.1

1976

5.3

2017

6.5

2018

6.5

2003

6.4

1916

7.1

2012

7.4

1934

5.3

2003

5.3

2004

6.8

1994

7.2

1980

0.0