1972

6.7

2003

5.7

2002

6.4

1997

6.7

2017

5.2

1976

5.2

2008

6.0

1977

6.8

1993

6.2

1998

6.3

2022

6.4

1999

7.0

1988

6.3

2004

5.3

2015

0.0

1974

7.1

1985

6.3

1988

6.2

1995

6.5

1988

5.7