2016

6.9

1992

6.7

2007

6.4

2009

6.3

1986

6.3

2006

5.5

2000

7.6

2005

6.6

1994

8.7

2005

5.5

2005

7.4

2013

5.2

2019

7.0

2011

6.5

1997

6.4

2006

6.1

2001

6.2

2011

7.0

2013

6.8

2011

6.7