1980

6.1

1973

7.5

1983

6.7

1974

5.1

1972

6.2

1987

7.1

2012

5.6

2019

1.0

1999

5.7

2023

0.0

2019

4.5

1993

6.5

2003

7.0

1997

8.0

2003

4.2

2005

4.0

1992

6.6

1972

6.4

2010

0.0

2004

7.0