1981

6.5

1985

4.9

1991

0.0

1998

7.4

1982

7.0

1994

3.5

1981

6.0

1992

7.0

2013

5.5

2013

7.2

2009

6.3

1989

5.8

2018

0.0

1994

7.5

1997

2.5

2011

5.7

2003

7.6

2024

7.5