1966

6.3

1966

6.4

1974

6.1

1999

5.8

2004

6.4

1998

5.1

1984

5.8

1973

6.7

2005

5.5

1987

4.0

2007

5.2

1990

5.7

1948

7.1

1942

5.8

1969

6.4

1943

6.2

1939

6.7

1957

6.8

2004

6.4

1967

6.5