1999

7.6

1986

5.0

1998

6.7

1997

7.5

1986

7.3

2016

7.5

2004

7.4

2015

6.0

2006

7.4

1988

8.0

1979

6.8

2001

4.2

1992

0.0

1983

6.3

1984

6.6

1991

7.8

1988

0.0