1927

5.9

1929

6.5

1953

7.7

1998

6.0

1992

7.5

1929

7.5

1965

8.5

2006

6.9

2000

0.0

1958

7.7

1984

8.0

1998

7.4

1957

8.5

1966

7.7

1989

7.2

1996

6.8

1990

7.0

1996

6.1

1959

0.0

1969

0.0