1989

8.1

2016

7.0

1986

6.0

1992

7.0

1996

6.3

1982

6.0

1997

7.5

1994

8.4

1983

7.1

2009

7.7

1975

7.1

1977

7.6

1978

0.0

2013

6.9

2000

6.1

1977

7.4

1984

7.7

2003

10.0

2007

0.0

2014

6.4