2002

6.0

1984

5.9

1982

5.8

2013

5.5

1983

6.6

1977

6.3

2017

6.8

2015

7.1

2017

7.3

1957

6.5

2015

3.8

2009

5.5

1967

7.2

2006

7.0

1983

6.5

1994

3.0

1977

5.5

1983

5.4

2011

5.0

2009

4.4