1989

7.2

1996

6.8

1958

7.7

1998

7.4

1984

2.0

2000

0.0

1983

0.0

1997

6.2

2006

6.9

1955

7.0

1966

7.3

1998

5.3

1992

7.5

1929

7.5

2002

7.1

1948

7.9

1980

0.0

2011

8.8

1961

7.3

2005

6.8