1971

4.8

2011

6.0

2014

4.2

2006

5.5

2014

6.3

1982

0.0

1999

3.5

1999

0.0

2000

5.4

1982

7.4

2013

5.5

1977

5.3

2008

4.5

1974

5.5

2007

4.0

2016

6.8

1989

5.7

1978

6.2

1997

7.2

2006

6.3