2002

6.0

1999

7.0

1982

5.4

2008

6.7

2006

5.6

2016

7.1

2007

6.1

2007

6.3

1973

3.5

2005

6.1

1979

6.1

2007

5.9

1997

5.7

1987

6.8

2008

5.6

1966

5.0

2009

6.2

2002

5.1

2014

6.5

2005

5.5