2002

6.4

2004

3.8

1992

5.0

1998

5.8

1977

4.1

2017

6.7

2008

6.8

1989

6.0

1991

5.8

2011

5.1

2015

4.6

2009

6.0

2005

6.0

1954

6.0

1962

0.0

1990

6.6

1997

4.0

1991

3.5

1967

4.4