2009

5.7

2008

4.6

1969

6.6

1978

7.5

2004

7.7

2002

7.6

2017

7.0

1990

0.0

2016

7.0

2010

7.5

1999

5.8

1944

6.0

1988

6.8

1971

7.2

2016

7.0

2004

6.0

2011

5.0

1977

4.8

2015

4.9

2015

5.3