2004

5.7

1985

6.4

1984

7.3

1988

7.5

1977

7.6

1951

6.3

2002

6.3

1989

7.8

1928

7.6

2012

5.6

2014

6.5

1969

7.8

2010

5.8

1985

6.5

2003

7.2

1994

5.9

1999

6.1

2013

6.8

2009

6.2

2001

5.3