1954

7.9

2005

6.4

1963

8.1

1960

8.1

1957

7.2

2003

7.3

2006

6.6

1974

8.6

1962

7.3

2004

6.5

2000

7.6

1982

7.9

2000

6.3

1987

7.8

2005

6.9

1958

7.7

1998

7.7

2006

7.2

2006

6.9

1971

7.6