1988

5.0

2002

5.3

2005

5.3

1971

7.3

1997

6.1

1968

6.7

2017

4.4

1997

4.0

2009

3.8

1984

5.5

1999

4.9

1998

6.0

1968

7.0

2003

4.8

2016

3.9

2013

6.0

2023

0.0

1995

5.7

2002

7.0

1989

6.6