1986

5.9

1999

5.8

1979

6.3

2014

6.5

2007

7.6

2006

4.2

2011

0.0

2006

5.0

2002

10.0

1992

6.0

1972

7.9

2015

8.0

2002

8.0

1982

5.4

1994

4.0

2003

7.6

1998

6.2

1983

5.0

2007

6.5

2005

10.0