2004

6.9

2016

5.3

2014

6.1

1941

6.2

2007

7.1

1979

6.4

1978

6.6

1993

7.7

1993

7.9

1998

6.3

1995

7.2

2008

6.6

1997

6.2

1995

6.5

2005

7.2

1996

7.3

2009

7.2

1938

5.3

2020

0.0

1997

6.3