1998

5.9

2002

3.0

1997

0.0

1972

7.7

1998

7.7

2007

6.4

1916

6.6

2006

4.9

1964

6.5

1995

7.0

1931

8.3

2004

6.3

1993

7.2

1994

6.8

1953

7.3

1992

7.4

2004

6.6

1958

6.4

2001

5.9

1977

6.3