2007

6.3

2001

7.6

2011

6.2

1990

6.0

1996

6.1

2008

6.5

2001

5.4

1992

6.7

1938

7.1

1941

7.0

2007

6.5

2007

5.6

2004

7.2

2006

6.3

1992

7.7

1997

6.4

2008

7.7

1990

7.4

2005

6.9

2005

7.3