2003

7.2

1992

6.9

1995

5.7

2005

3.8

1986

6.3

1976

6.2

2004

7.3

1990

6.0

1991

6.2

1996

6.5

2005

7.7

1954

8.4

2002

7.5

2000

7.4

2006

6.9

2017

0.0

1996

6.2

2006

7.5

1984

7.2

1998

6.5