2006

6.5

1948

7.7

2008

5.4

1968

7.4

2007

6.1

2005

5.5

2007

6.1

1958

7.5

1956

6.4

1961

7.6

2006

5.8

1994

6.8

2000

7.1

1968

7.3

1962

7.2

1981

6.3

1960

8.2

1984

8.4

1996

6.9

2004

6.8