2003

4.2

2016

5.6

1978

4.6

1988

5.2

1983

3.5

2011

5.3

1988

6.5

1993

7.5

2005

5.9

1979

5.7

2002

6.0

1984

7.1

1953

7.0

1980

6.7

2005

4.5

1992

7.5

2000

6.5

2004

6.1

2006

5.3

0.0