2007

5.8

1979

0.0

2005

6.0

2006

6.4

1996

6.3

1977

7.4

1995

6.1

2004

5.9

2003

3.9

1976

4.8

2007

5.2

2015

4.7

2003

2.1

1973

4.0

1974

7.3

1984

8.1

1972

6.2

1994

7.3

1984

6.9

2015

6.4