1972

6.5

2017

5.2

1997

6.6

1994

6.7

2004

5.8

2018

0.0

1999

7.1

1992

5.4

1996

6.1

1993

6.7

1976

7.5

1985

7.5

2018

6.6

1994

6.4

2023

0.0

1990

6.9

2007

5.5

2008

7.3

1984

7.2

2005

6.5