1972

5.0

1987

4.6

1997

4.1

1997

6.5

1989

4.4

1998

7.1

1989

5.7

1985

6.6

2006

5.7

1984

6.0

2016

0.0

1983

6.7

2007

7.2

2017

4.5

1995

6.2

1987

5.1

1976

6.6

2000

7.4

2018

5.5

1979

6.7