1982

7.0

2008

6.6

2014

7.0

2009

5.6

1982

7.6

2006

6.6

1957

7.2

1994

6.8

2017

6.9

1981

0.0

1983

0.0

1934

6.0

1997

6.7

1999

6.5

2006

6.9

2007

5.8

2008

5.9

1992

6.8

1987

5.7

1981

6.1