2005

7.4

2020

6.8

1989

5.4

2007

6.5

1990

6.0

2010

6.1

2004

6.7

2005

6.2

1967

7.3

1940

7.1

1990

6.3

2006

6.3

2016

6.9

1999

6.6

1985

6.2

1990

5.8

2002

6.6

1991

7.6

2009

7.7

2012

7.1