1999

5.6

2019

8.5

1985

8.3

2006

6.8

1994

8.7

2003

7.7

2008

7.0

2009

7.6

1972

8.7

2006

7.5

2004

8.1

1940

7.1

1995

8.0

2013

8.1

2009

7.3

2012

7.4

1985

7.7

1994

8.5

1997

6.2

2011

7.5