1992

0.0

1997

7.5

1996

6.4

1995

8.2

2001

6.6

1999

7.7

1984

7.1

1981

8.1

2003

8.1

2003

7.5

2012

5.0

2004

8.2

2000

6.9

1997

6.6

1990

7.0

2008

6.7

2015

6.5

2014

8.5

2024

5.7

2023

7.4