1996

6.2

2005

5.8

2005

6.2

2020

7.0

2000

6.4

2019

4.5

2008

6.5

1932

0.0

1971

5.3

0.0

1987

5.7

2003

5.9

1973

6.8

1997

6.1

1986

7.0

2007

5.9

2005

5.5

2005

6.7

1940

5.0

2002

5.5