1965

2.4

2000

5.5

1989

6.0

2000

8.2

2006

6.1

1994

8.3

1932

7.8

2004

7.4

1986

7.6

2006

5.6

1995

8.4

1931

8.1

2004

7.2

1993

5.5

2005

7.0

2002

7.6

2014

5.8

1945

8.1

1999

7.3

1992

6.6