2003

6.6

1986

8.8

2013

6.4

2008

8.5

2012

7.3

2007

7.4

2000

7.2

2012

6.0

2010

6.1

2011

6.7

2015

6.8

2003

6.7

2016

5.7

1964

7.5

2004

5.8

2007

5.7

2014

6.1

2008

6.6

1994

8.5

1980

8.4