2000

6.0

2008

6.3

2005

7.2

2013

7.9

2009

7.0

2015

6.9

1994

5.4

2003

6.1

1985

6.5

2005

6.7

1958

7.0

2011

7.5

2011

6.9

1955

7.9

1964

7.0

1985

6.8

1993

5.5

1965

7.4

2012

6.3

2012

5.5