2005

7.5

1994

6.1

2008

5.6

2000

6.4

1999

6.8

2008

5.5

2009

6.9

2007

7.4

2011

7.4

1983

6.7

2014

6.3

1959

7.0

1997

5.9

1974

5.7

2009

5.3

2024

0.0

2013

7.2

1962

4.5

1981

2.0

2004

5.7