1966

3.8

2005

6.9

1995

6.5

1985

4.3

1952

7.4

1997

4.6

1955

7.9

1997

4.8

1994

6.8

1964

5.0

1993

6.6

2004

6.5

1962

7.4

1975

7.2

1933

0.0

1956

7.1

1988

6.2

2014

5.8

1978

6.8

1958

6.0