1992

6.8

2000

6.2

1993

8.0

2003

8.2

1998

10.0

1960

7.6

1987

7.0

1990

8.6

1996

7.5

1972

6.6

1967

0.0

2017

0.0

2017

6.6

2006

0.0

2017

0.0

2013

8.5

0.0

1971

0.0

1957

0.0

1980

0.0