1997

5.3

1996

6.5

2011

5.9

2001

6.2

2004

7.7

2009

5.6

2002

7.0

2005

6.7

1935

3.0

2014

7.0

2018

6.5

1962

5.9

2014

5.8

1941

0.0

2008

7.3

1970

6.0

2000

7.2

2004

6.6

2019

7.6

2001

6.5