1993

8.2

2009

7.8

1996

7.0

1980

7.8

1969

8.3

1965

7.5

1990

6.6

2006

5.4

1999

7.3

2011

0.0

1999

7.6

2004

10.0

2001

5.6

2024

8.0

1968

7.0

2018

0.0

2023

8.4

2002

6.5

2000

6.4

1977

0.0