1966

3.0

1972

6.3

1975

4.9

1945

5.4

1973

5.7

1958

5.9

1961

6.5

1964

6.5

1956

4.1

1973

6.0

1946

6.7

1973

6.0

1984

5.8

2009

2.1

1977

6.4

1926

6.3

1944

5.4

2000

5.5

1978

5.6

1992

5.0