2005

6.5

1996

6.4

1987

7.5

2001

7.2

1990

6.3

1989

5.7

1998

6.4

2007

5.2

1977

2.9

2018

0.0

1965

5.3

1980

3.5

1913

4.9

1995

5.9

2008

3.0

1979

0.0

2012

6.5

1957

6.4

1957

5.0

1958

6.1