1998

6.4

2001

6.3

2006

6.2

2005

6.9

1997

4.3

2007

5.6

2014

4.3

1998

7.5

2001

5.6

2025

6.6

1999

6.1

2006

2.6

0.0

1977

7.2

2009

7.1

2006

5.7

1976

7.4

1979

5.1

1978

5.0

2000

7.2