1995

6.1

2013

6.4

1985

8.3

2015

6.0

2004

6.6

2004

7.4

2002

7.7

2016

7.6

2016

7.4

2007

7.7

1994

8.5

2001

7.9

2005

7.8

2018

6.9

2009

7.8

2018

7.4

1983

6.6

2010

7.7

2013

6.3

2000

6.8