2005

7.2

1998

5.8

2012

4.8

1985

0.0

2010

7.5

1979

6.7

2007

6.6

2014

6.5

1984

6.6

1998

6.8

1983

5.3

1998

6.0

1989

5.8

2007

7.8

1990

7.0