1972

4.0

2011

5.5

1988

6.0

2011

7.2

2004

7.1

2007

6.7

1999

7.0

1990

6.3

2000

7.2

2016

7.4

1997

4.7

1987

7.6

2012

6.4

2007

6.7

2011

7.0

2006

6.2

2008

7.1

1972

6.6

2008

5.5

2016

10.0