2006

7.8

2005

8.1

1999

7.6

2006

5.0

1993

4.8

2002

8.1

2005

2.8

1967

7.6

1994

7.1

2012

6.0

2007

7.5

1990

7.2

2017

0.0

1976

0.0

1983

6.0

1982

7.0

1969

8.2

1987

7.5

1984

7.2

2010

5.0