1986

7.5

1995

7.9

2008

6.3

1985

6.6

1984

7.0

1999

6.7

1996

6.0

1938

7.5

1960

7.8

1995

2.7

2001

6.9

1944

7.3

1996

6.5

1989

7.2

2015

6.5

1970

0.0

2007

4.8

1975

5.8

2005

7.0

2011

6.1