2014

7.3

1975

6.2

2015

5.9

2020

6.4

2015

6.0

2014

7.2

2003

7.8

1991

7.7

2000

5.5

2016

7.2

2010

6.9

2010

9.0

2004

6.8

1951

6.4

1992

6.8

1976

5.0

1987

7.8

1973

7.1

2005

7.9

2011

7.8