1968

6.2

2017

6.4

1993

8.0

1990

7.6

1992

7.9

2004

5.5

2023

9.5

2005

7.4

2006

5.5

1985

6.5

2005

5.1

1988

6.6

1984

7.2

1996

6.6

2003

6.2

2017

6.7

2006

5.3

2006

6.2

1987

0.0

1999

7.3