1999

6.8

1992

7.7

2001

7.5

1993

6.7

1997

7.9

1931

8.3

2006

7.0

1925

8.0

2006

7.1

2006

7.3

2007

6.1

2006

7.3

2017

0.0

2014

4.5

1941

0.0

2020

6.2

2004

5.6

2004

8.1

1994

7.4

2005

7.4