2006

6.7

1956

7.0

1999

6.9

1995

6.5

1952

7.4

2005

6.9

1987

4.7

1955

7.9

2014

6.8

1971

6.5

1931

1.0

1989

6.0

1963

7.3

2008

5.4

1984

5.8

1969

6.0

1947

5.0

1983

2.7

2007

5.6

1993

5.5