1989

5.0

1988

0.0

2005

7.8

1979

4.8

1992

7.1

1978

4.0

2009

5.6

1982

0.0

2013

5.5

2004

7.0

2003

6.3

1997

0.0

1969

7.2

1990

6.0

1974

7.0

2012

4.1

1998

4.6

1991

5.9

2007

1.8

2012

6.8