1939

6.1

1988

6.0

1934

6.8

1935

6.3

1936

6.1

1975

5.8

1962

6.2

2018

7.4

1986

5.0

1974

1.5

1971

7.5

1999

7.0

1991

7.2

2006

6.0

1958

6.4

1997

6.7

1964

6.8

2021

6.6

2005

6.1

2005

5.7