2016

7.8

2003

7.5

2001

7.4

5.0

1979

7.4

2002

6.9

2005

6.0

1991

5.4

1983

5.5

2004

7.3

2006

0.0

1984

5.5

2000

6.5

1999

7.9

2005

7.0

2006

5.8

1996

7.6

1985

7.2

2007

4.0

2007

6.5