2005

6.3

2019

7.1

1996

8.0

2007

6.1

1990

9.0

1987

6.2

2006

7.8

2002

7.1

2005

6.3

2014

6.9

2014

3.1

1954

6.2

1928

0.0

2008

6.0

2009

4.7

2009

4.4

2004

7.7

2001

4.5

2009

5.3

1976

4.8