2005

5.3

2009

6.3

2010

6.3

1971

7.3

2009

7.0

1990

5.7

2019

5.8

2006

5.4

2007

6.7

2004

4.8

2007

7.2

2000

6.4

2001

6.1

1983

3.0

2014

6.7

1998

7.5

1991

6.8

1999

5.7

1991

7.3

2007

6.1