2001

6.5

2006

5.5

1998

7.3

1989

7.4

1991

6.2

1995

6.9

1996

6.6

1996

7.1

1979

7.3

1998

7.9

1953

7.2

2009

0.0

1967

0.0

1944

6.0

1956

8.0

2004

6.8

1959

6.2

1985

6.3

2007

7.4

2018

6.5