2005

5.5

1951

7.2

2013

7.5

2000

6.2

2008

8.7

2001

5.3

2005

5.2

1979

7.3

1942

6.9

2001

5.2

1940

7.1

2010

6.7

1998

7.2

1959

6.9

2015

6.3

1968

6.7

1994

6.5

2012

6.3

1991

8.3

2007

6.5