2005

3.7

1997

7.6

1995

7.0

1999

7.5

2013

1.5

2006

5.6

1999

5.5

2008

6.3

2013

5.9

2012

4.0

2009

4.7

2024

5.5

1992

6.5

2017

6.7

2007

1.0

1996

7.0

1971

7.0

2017

0.0

2005

4.8

1989

6.3