2007

6.2

2016

4.6

2006

6.0

1978

7.5

2015

3.6

1997

6.6

1999

6.3

2002

6.0

2015

2.3

2004

7.1

1951

6.4

2017

5.6

1943

5.2

1996

4.5

2005

5.4

2004

5.5

2008

5.8

2005

3.2

2007

2.9

2003

6.0