2000

7.5

2001

7.8

2004

7.3

1992

7.7

1988

7.0

1981

6.5

2005

7.0

2003

5.8

2006

8.2

2006

7.3

1994

7.0

2006

8.2

1977

6.6

2002

6.1

2023

0.0

1994

4.8

1978

7.3

2017

6.7

2017

7.3

2017

7.0