2003

6.3

1940

6.5

2001

5.2

2004

5.8

2008

6.5

2005

7.2

2016

5.7

1992

6.5

1999

7.1

2007

6.4

2009

6.1

2001

6.6

2009

6.8

1992

7.4

2009

6.6

1986

7.4

2011

7.2

2000

6.5

1999

7.3

2001

6.9