2017

5.8

2016

7.1

2016

8.0

2007

5.5

2014

3.6

2014

5.7

1983

5.8

2014

5.2

1993

4.2

1995

6.9

2003

7.1

2003

7.1

2000

7.0

2002

7.4

2014

5.0

1954

5.9

2005

5.5

2007

7.1

2006

6.4

1985

6.1