1952

6.7

1999

6.2

2002

6.6

2002

6.3

1963

7.1

2004

7.2

1949

7.7

2001

5.8

1933

7.5

2001

6.1

2009

6.1

1990

5.5

1992

5.3

1946

7.6

1972

6.0

2007

6.4

2003

6.3

1962

7.7

1990

7.5

1986

7.0