2016

6.2

2009

7.4

2005

6.7

2016

8.2

2015

6.8

2001

8.5

1994

7.0

2002

7.4

1970

7.3

2008

8.1

1985

8.3

1988

7.5

1990

7.7

2010

6.4

2003

7.8

1999

8.2

1982

7.9

1993

7.2

2007

7.2

1987

7.3