1969

5.3

1966

7.9

1964

7.4

1966

6.5

1967

6.5

1955

7.3

2003

6.1

1988

7.2

1997

6.5

1975

6.8

1960

5.9

1986

6.3

1997

6.2

1972

2.5

1972

10.0

2003

6.3

1954

6.2

1925

0.0

1990

5.8

1926

7.0