1978

5.1

2005

5.0

2016

7.2

2004

5.6

2004

8.1

1987

6.9

2007

5.9

1992

5.7

1981

6.6

1986

6.7

2008

5.5

2017

6.4

2024

0.0

2002

6.4

2016

4.9

1991

5.2

2016

5.5

1998

0.0

1967

6.5

1991

6.8