1998

7.4

2017

10.0

1973

7.7

2020

0.0

2007

7.5

2012

7.1

1977

5.0

1980

5.5

2003

9.1

1989

6.1

2006

0.0

2005

8.0

2007

7.5

1990

6.2

1979

6.5

2006

6.2

2004

6.2

2014

6.8

1970

7.5

1976

7.0