1962

7.0

1963

7.1

1964

7.3

1959

7.9

1967

6.6

1969

6.6

2001

7.9

2005

7.8

1974

6.4

1977

6.8

1979

6.2

1972

7.1

1997

7.1

1975

7.7

1990

7.8

1939

7.6

1967

7.6

1990

7.4

2023

4.7

2011

0.0