2003

6.2

2006

7.5

1994

6.8

1954

7.9

1997

5.8

1989

6.3

1994

8.7

2006

6.4

1985

7.8

1991

7.3

1980

7.1

2001

7.2

2002

6.8

1999

4.9

1974

6.7

2020

6.2

2007

6.5

1959

7.7

1973

6.9

1970

7.5