2008

6.6

1999

6.4

1972

7.3

2003

5.7

1984

6.1

1985

5.4

1959

6.9

1938

7.5

1995

6.2

1963

7.2

1986

6.9

1991

4.7

1994

4.7

2001

6.9

1998

6.0

1989

6.8

1994

5.0

2000

5.3

2002

5.6

1982

6.8