2005

6.5

1974

7.5

1999

7.4

1973

6.5

2001

5.4

2002

5.7

1992

5.3

2003

5.5

2010

6.4

2009

6.1

2000

5.7

1996

6.6

2001

6.0

1995

5.1

2008

6.6

1967

5.3

2016

7.0

2000

5.8

1999

6.4

2008

6.2