1991

3.3

1982

4.5

2000

6.6

1971

4.5

1995

6.3

1994

5.5

1979

6.7

1978

6.5

2008

6.6

1999

7.5

2006

6.5

2017

6.3

2008

6.4

1931

5.0

1977

0.5

1930

5.1

1966

6.8

1975

6.4

1923

5.2

1941

7.2