2008

7.4

2014

6.5

2003

7.0

1964

7.5

2015

6.0

1985

6.2

1967

6.6

2013

6.3

2016

5.7

2013

6.9

2010

6.1

2000

7.2

2013

5.9

2012

7.1

2014

7.0

1986

7.3

2015

7.0

2013

6.9

2005

6.9

2012

7.0