1989

6.3

1990

5.5

2014

6.2

1997

7.1

1987

7.1

1956

7.1

2004

7.2

2015

0.0

2016

0.0

1936

6.5

1987

4.5

1958

6.9

2008

6.0

2004

3.5

1994

5.2

2007

5.1

2002

6.7

2003

7.1

2001

6.7

2001

6.5