2009

6.0

2004

7.2

2002

6.6

2006

4.4

1998

6.3

2006

7.0

2008

6.4

1998

6.3

2002

7.8

1991

6.6

1990

6.3

1996

5.9

2010

3.7

2017

5.6

2019

7.2

1988

4.9

1949

7.6

1995

5.6

2004

6.1

1940

4.0