1968

3.5

1981

6.8

2008

5.3

2014

5.2

2008

6.9

1967

0.0

1968

5.3

2013

1.0

2023

0.0

1987

5.9

2005

6.4

1996

3.8

2025

6.4

1999

5.0

2013

5.2

1997

5.6

2012

8.3

1995

5.9

1973

7.0

1999

7.1