1938

5.3

2008

6.2

1951

6.8

1975

6.5

1984

6.9

1959

7.2

1993

5.8

1982

6.6

1998

7.3

1936

6.4

2007

7.3

1966

6.8

1959

6.3

1989

2.0

2002

4.3

1958

7.4

1935

5.0

1964

6.1

1987

6.0

2005

7.2