2014

7.0

2012

7.2

2010

9.1

2014

7.2

1990

6.1

1993

5.6

2011

7.2

2012

4.5

2011

7.3

2013

7.7

1971

4.7

1972

4.0

1968

5.7

1997

7.8

2011

6.0

2000

7.2

2020

3.7

1988

6.5

1996

5.7

2006

7.6