1986

6.3

1994

5.9

2008

6.0

0.0

1996

6.9

2008

4.8

1987

10.0

2005

7.9

2003

8.1

1979

0.0

2002

7.6

2011

7.5

2014

6.2

1981

6.5

1993

6.8

1996

7.2

1982

6.3