2007

6.4

2001

6.1

2007

5.6

2001

7.5

1965

7.0

1955

7.2

1995

8.0

2008

5.3

1994

6.9

1960

7.6

1998

7.0

1974

6.6

1989

7.3

2003

6.4

2006

4.3

1931

6.9

2012

5.3

2016

6.0

1950

6.5

2015

6.0