2010

7.1

2008

8.9

2014

7.8

2003

5.7

1995

6.5

1969

8.2

1999

8.2

2003

5.5

2009

5.9

1977

7.6

2010

7.7

1996

7.5

2011

7.5

2011

7.0

1990

6.9

2006

8.6

2008

7.6

1999

7.9

1987

7.6

1990

8.1