1994

5.3

1966

7.9

2005

6.7

2000

7.3

2004

7.5

1985

6.2

2011

6.1

1999

5.1

1975

7.9

1999

6.3

2006

6.6

1952

7.3

1989

9.3

2014

4.4

1997

6.8

1986

6.3

2008

6.3

2006

7.6

2009

6.2

2012

6.3