1998

0.0

2004

5.9

2009

5.7

1983

6.0

1996

5.2

2007

5.4

2008

7.3

1931

8.3

2006

7.0

1989

7.8

1925

8.0

2002

7.2

1962

7.6

1972

6.9

1994

7.0

2006

7.1

2006

7.3

2007

6.1

2002

5.4

2001

7.3