2009

4.6

2005

6.1

1984

5.8

2014

5.1

2009

6.8

2008

6.7

1992

6.0

1995

7.2

1996

5.3

1985

5.4

1967

7.3

1984

6.8

1997

5.3

2006

6.5

1980

5.2

1981

5.4

2003

6.4

1971

4.5

1963

5.1

1967

5.0