2005

6.2

1978

6.6

2004

6.8

2001

6.1

1996

5.5

1992

6.8

2002

6.3

2003

5.5

1955

7.1

2008

6.3

2008

6.8

1999

5.5

2004

6.5

1964

5.7

2002

0.0

2016

6.3

2005

5.7

2005

5.5

2002

5.3

2013

5.0