1980

4.7

1934

6.3

1998

6.9

1997

6.5

1996

7.1

2005

5.4

2004

7.3

2003

5.8

1964

6.6

1896

7.1

2002

5.3

2001

5.5

1984

6.2

1995

4.1

1911

0.0

1968

0.0

1999

6.8

2007

5.4

1956

6.4

2009

7.0