1983

1.5

1960

6.3

1996

6.2

2003

6.2

1973

8.0

1986

7.0

1999

5.7

1986

6.6

1999

6.5

1994

7.1

2003

6.6

1991

6.3

2017

0.0

2002

5.4

2002

4.4

1986

5.8

1978

5.0

2023

6.1

2000

7.4

2008

6.8