1999

5.8

1997

6.7

1993

5.3

1999

5.4

2005

7.2

2007

6.9

1958

7.0

1995

6.0

1938

7.5

2018

4.8

2001

5.6

2009

6.6

2008

7.3

1983

6.0

2009

5.5

2014

6.5

1999

6.3

2000

5.2

2000

3.0

2014

7.0