2003

7.4

1982

7.5

2002

6.6

1984

6.6

1997

7.7

1994

6.2

1961

7.6

1989

7.8

1980

6.6

2001

7.2

1986

7.1

1990

6.3

2002

7.2

1982

6.4

1989

5.7

1954

7.0

1991

7.0

1991

7.3