2010

5.9

2009

5.4

2009

5.3

2014

4.9

1980

6.4

1988

6.2

2005

5.2

2008

4.0

1965

6.4

2015

6.0

1960

8.4

2005

7.1

2006

6.6

1982

7.2

1999

6.5

2017

4.3

2014

7.7

1986

7.4

1995

5.1

1986

6.0