2013

6.8

2002

6.6

2005

7.4

2011

7.0

2000

6.2

2016

7.3

2012

6.4

1982

6.9

1977

8.2

2006

5.0

1990

7.5

1983

7.9

1994

7.1

1986

7.2

1990

6.9

2011

6.8

2012

6.3

2014

7.9

1993

6.4

1990

5.8