2001

6.2

1991

5.8

1960

7.3

1951

5.2

1987

3.2

2001

5.9

2000

6.8

2004

6.5

2004

6.1

2003

7.2

1962

7.4

1963

6.3

2017

7.3

1998

7.3

1998

7.3

2003

6.2

1956

6.5

1932

6.9

2001

6.9

2004

7.0