1989

8.1

1981

6.4

2003

6.4

2003

0.0

2010

6.9

2014

7.5

1994

8.4

2002

0.0

2003

7.5

1984

6.6

2016

8.2

2012

6.8

2009

7.0

2013

7.4

2015

7.0

2001

7.2

2016

7.0