1902

7.9

1932

7.3

1997

7.6

2005

6.7

1986

7.7

1998

6.8

2001

7.8

2004

7.3

2007

6.3

1972

6.4

1992

7.7

1997

6.6

1999

6.3

2002

6.0

1999

7.4

1951

7.5

1956

7.3