1988

5.8

1981

6.8

1972

6.0

1974

1.0

1972

7.9

1993

7.1

1989

7.8

1986

8.0

2004

8.2

2002

7.6

2012

7.1

2004

8.6

2017

6.6

1989

6.5

2012

6.0

2025

7.0

1993

6.0

1985

6.2

1975

5.0

1975

0.0