1966

7.3

1997

7.8

2001

6.7

2016

5.9

1996

6.8

1994

7.5

1929

7.5

1989

8.3

1986

7.8

1972

8.7

1974

8.6

1994

7.0

1993

7.4

1957

0.0

1958

7.6

1984

8.0

1985

7.0

1998

7.4

1957

8.5

2000

7.0