1999

8.7

1997

4.6

1985

6.2

2013

8.0

2011

6.2

1991

7.0

1989

6.4

1984

6.6

2004

6.5

2009

5.3

2005

7.1

1988

7.8

2001

5.8

2021

7.9

2024

6.5

2013

6.9

1998

8.1

1984

7.4

2003

7.2

2024

7.6