2005

6.8

1981

6.4

2003

6.5

2008

6.6

2015

5.0

2008

7.2

2005

5.5

2024

0.0

2017

6.5

2006

5.6

1991

0.0

1996

7.2

2014

6.9

2019

8.0

1998

7.8

1975

6.1

1968

6.1

1981

6.3

2023

5.3

1979

6.4