1994

4.6

2010

5.6

2010

5.9

2012

6.3

2009

5.7

2007

4.9

1944

6.9

1985

8.1

2012

5.8

1978

5.9

2001

6.2

2018

7.1

1987

5.3

1965

6.7

2012

6.6

2009

6.1

1996

5.2

1995

6.0

1981

7.2

1969

7.0