2001

6.8

2006

7.5

0.0

2005

6.8

2009

5.0

1992

6.2

2014

6.0

1956

7.9

1964

7.0

2005

6.7

1994

6.7

2019

8.0

1989

5.9

2005

5.7

2004

5.1

1979

5.8

1977

5.9

0.0

2017

0.0

2002

7.1