1969

5.5

1996

5.7

1979

6.5

1980

5.0

1997

6.6

2016

5.6

2008

4.2

1999

7.2

2014

5.2

2007

8.0

2010

8.0

2011

7.0

2009

5.5

2020

4.7

2002

0.0

1989

5.9

2021

6.0

2010

0.0

1995

6.4

1996

0.0