1943

7.5

1985

8.2

1982

7.6

1966

7.3

1961

8.0

2001

7.4

2013

5.3

2014

7.0

1959

7.2

2002

7.0

1986

6.7

2006

0.0

1970

7.5

2005

7.7

2001

6.9

2006

6.7

2006

5.2

1996

6.2

2001

6.4

1952

6.8