1964

7.8

1940

5.2

1966

8.5

1990

6.5

1968

7.5

1966

7.2

2004

4.8

2015

5.6

1962

7.8

1975

5.3

1969

6.4

1966

5.9

1951

5.5

2000

4.9

1975

6.3

1991

5.4

1977

6.6

1939

5.5

1933

5.3

1994

5.7