1993

6.0

1998

6.3

2004

5.8

1996

6.2

2015

5.9

2007

6.6

2005

6.7

2022

7.4

1992

6.5

2004

6.6

2004

5.6

1984

7.2

1999

7.6

2005

7.0

1977

7.7

1998

7.2

2007

6.7

2016

5.6

1982

0.0

2019

7.5