2014

6.4

2001

6.3

1995

6.9

1983

6.6

1990

5.5

2000

6.3

1995

6.3

1998

6.8

2004

6.5

2007

6.6

2013

5.2

1985

7.0

1989

7.2

1987

6.3

1994

6.8

2005

5.8

2003

5.5

1980

6.8

1981

7.1

2018

0.0