2006

6.8

1996

2.7

2007

7.2

2008

7.5

2002

7.1

2005

1.0

2002

5.3

2014

7.4

1969

5.3

1956

7.0

1938

6.0

1950

7.1

1986

5.7

1971

2.0

1973

5.4

1976

4.7

2004

7.2

1999

6.6

1960

0.0

1983

4.6