1969

5.5

1996

5.7

2014

5.2

1997

6.6

2008

4.2

1980

5.0

1979

6.5

2007

8.0

1989

5.9

2002

0.0

2016

5.6

1999

7.2

2007

5.8

2017

0.0

2017

7.8

2010

8.0

1995

6.4

2020

4.7

2006

5.8

2002

9.0