1985

7.7

2000

6.3

1990

7.5

2004

6.9

1935

8.0

2005

3.2

2003

5.7

2006

7.1

2000

6.7

1983

7.2

2004

6.0

2007

6.2

2016

6.9

1997

6.5

1944

7.0

1984

7.1

1987

7.3

1928

0.0

2016

7.7

1960

8.2