2005

6.3

2002

7.3

2006

5.8

2006

7.5

2014

6.4

1944

7.6

1999

7.4

1956

7.7

1990

7.2

1967

6.6

1971

6.4

1977

6.8

1990

8.5

2003

6.0

1943

6.0

1999

5.6

1948

7.9

2004

6.6

2005

6.7

1996

7.4