2004

5.8

2007

5.0

1994

6.1

2008

5.5

2007

7.4

2008

5.6

2016

1.5

1999

6.8

2000

6.4

2005

7.5

2009

5.3

2001

7.0

1959

7.0

1997

5.9

1974

5.7

1983

6.7

2009

6.9

2013

0.0

2011

7.4

1962

4.5