1990

7.6

1992

7.9

2004

5.6

1995

5.0

1961

6.0

2006

0.0

1974

6.0

1972

6.2

2012

0.0

2014

6.1

1976

6.5

1956

0.0

2007

6.4

2017

8.5

2008

0.0

2011

0.0

2003

6.1

2003

5.8

1987

7.1

1996

6.7