1997

7.7

1963

6.8

1941

5.0

2002

6.3

1979

7.6

1982

8.0

2007

5.4

2004

6.6

2002

6.7

2008

6.6

1969

5.0

2000

3.8

1972

7.3

1999

6.5

2003

5.8

1996

5.7

1992

5.6

2010

5.5

2013

5.5

2006

6.6