1988

4.8

2011

6.8

1981

0.0

1991

3.8

2016

5.8

2010

5.2

2006

6.6

1986

6.3

2003

5.6

2007

8.2

2005

0.0

1986

6.6

2005

4.0

2002

6.2

1999

5.2

2010

6.6

1987

4.5

1990

2.0

1991

5.0

1982

6.2

2001

6.2