1998

6.6

2020

7.0

5.0

2010

7.1

1988

6.7

1967

7.0

2012

6.3

2020

6.5

1987

7.2

1988

6.3

1974

7.0

2022

7.8

1986

6.1

2012

6.0

1982

7.6

2008

6.6

2004

6.8

1990

6.5