1989

2.8

2009

6.9

2005

4.6

2001

6.9

2009

5.9

2024

5.1

1981

5.5

2016

0.0

2014

4.4

2008

6.7

2008

6.5

2005

4.3

1988

7.2

2005

7.0

2006

6.9

1976

7.8

1976

7.0

1996

6.9

2002

4.3

1985

6.7