2008

5.7

2004

7.4

2014

6.4

1999

7.4

2001

5.9

1980

6.2

1994

6.6

0.0

1994

5.9

1951

7.7

1986

7.6

1995

8.4

2014

5.5

1993

7.5

2002

6.9

1995

6.5

1971

6.8

1954

8.0

1997

7.8

1978

7.2