1964

6.5

1999

6.8

1997

7.8

1962

7.4

1978

6.9

2021

6.1

2007

6.4

1978

5.9

1960

7.2

1964

7.2

1955

7.9

2013

5.9

2001

6.3

1999

6.4

0.0

1975

1.0

1979

4.8

1991

7.0

2002

7.4

2001

6.6