1975

5.5

2006

6.3

1999

6.4

1990

6.7

2019

6.4

2023

7.2

1980

5.1

1991

0.0

2005

6.4

1999

6.5

1987

6.9

1985

5.8

1989

4.5

2002

6.8

2001

5.1

1983

5.2

2009

4.2

2009

6.6

1997

6.0

2007

5.6