1939

6.9

2003

5.3

1991

6.7

1961

7.2

1988

6.7

1972

6.2

1958

6.5

1987

6.8

2007

5.5

1937

5.0

1993

7.0

1989

6.3

2013

0.0

2005

3.0

2020

7.5

2002

7.6

1996

6.2

1993

5.3

2003

5.8

2002

5.6