2004

8.1

2012

4.3

1985

7.2

1989

7.4

2013

4.3

1963

8.1

1991

7.1

1984

8.1

1969

6.6

1925

7.6

1986

7.0

1985

5.4

2005

6.8

2005

6.4

2014

4.0

2017

4.8

1956

6.0

1981

5.4

2000

5.8

1999

7.3