2005

6.9

2006

5.5

1997

5.6

2008

6.5

2004

6.6

1998

6.9

1969

6.0

2006

6.4

1994

8.3

2007

6.0

2000

5.5

1999

2.5

1986

0.0

1985

5.2

2015

9.0

1962

5.4

1997

4.3

1990

0.0

1992

6.2

1999

7.4