1990

8.5

1995

7.5

1998

6.4

2001

7.5

2003

6.3

2015

7.8

1988

6.5

1985

7.0

1995

6.3

2017

5.4

2001

6.7

2015

6.0

2025

10.0

2015

6.8

1963

5.8

2023

8.0

1953

5.9

1993

6.6

1980

7.9

0.0