1938

6.6

1997

6.0

1993

5.4

1915

0.0

1977

6.8

1981

6.5

1989

7.4

1966

6.4

1985

5.3

1990

7.4

1964

7.5

2000

6.5

1997

5.7

1945

0.0

1995

7.2

2003

6.3

1959

7.2

2001

6.4

2017

7.0

1979

5.8