1982

6.0

2014

6.5

1998

6.0

2001

5.9

1986

6.6

2001

5.5

2008

5.6

2001

7.8

1991

4.8

2004

6.2

2001

5.7

2002

3.3

2003

4.7

2013

4.0

1985

6.2

1985

6.6

1997

6.6

1994

5.8

2007

6.6

2015

5.4