1977

6.8

1985

4.0

2004

5.4

2014

6.5

1973

4.8

1996

6.8

2004

5.9

2006

7.0

2002

5.4

2003

6.2

1973

6.0

1966

6.3

2016

7.0

2015

6.8

2014

4.9

0.0

2020

5.2

2003

6.0

2014

7.9

2008

4.5